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Trunnion Ball Valve vs Floating Ball Valve: Which Is Better for High Pressure?

WCB Trunnion Mounted Ball Valve Manufacturer

High-pressure industrial systems—wellhead pipelines (5,000+ psi), hydraulic power units, or chemical reactors—demand valves that balance leak-tight performance, structural integrity, and operational safety. Two common solutions, trunnion ball valves and floating ball valves, differ drastically in how they handle pressure-induced stress. While both work for low-to-mid pressure applications, their designs create a clear winner when pressures exceed ANSI Class 600 (≈1,440 psi). Below’s a detailed breakdown of their performance, limitations, and ideal high-pressure use cases.

Core Design Difference: How They Support the Ball Under Pressure

The critical distinction between trunnion and floating ball valves lies in how the spherical closure element (the “ball”) is supported—a factor that determines pressure tolerance and durability.

Floating Ball Valve: Pressure-Driven Sealing (Low-to-Mid Pressure Only)

A floating ball valve has no fixed 轴 (trunnion) to anchor the ball. Instead:

The ball “floats” between two elastomeric or metal seats.

When the valve closes, line pressure pushes the ball against the downstream seat, creating a seal.

All pressure-induced force acts directly on the seats and valve body (no mechanical support for the ball).

This design works for low pressures (ANSI Class 150–300, up to ~720 psi) but struggles as pressure rises. The floating ball becomes a liability: high pressure increases friction between the ball and seats, raising operating torque and risking “valve 抱死” (a common failure where the ball sticks, rendering the valve inoperable) .

Trunnion Ball Valve: Mechanically Anchored for High Pressure

A trunnion ball valve solves this with a fixed support system:

The ball is mounted on two short shafts (“trunnions”)—one at the top (connected to the actuator) and one at the bottom (secured to the valve body).

These trunnions bear 90% of the ball’s weight and pressure-induced force, transferring stress to the valve body (not the seats).

Sealing is achieved via spring-loaded seats (or pressure-assisted “double piston effect” seats ) that maintain contact with the ball without relying on line pressure.

This mechanical anchoring is the foundation of its high-pressure capability—it eliminates seat stress and torque spikes, even at extreme pressures.

High-Pressure Performance: 5 Key Metrics Compared

For industrial high-pressure applications (ANSI Class 600+, PN100+), performance hinges on pressure capacity, sealing reliability, torque requirements, size scalability, and longevity. Here’s how the two valves stack up:

1. Pressure Rating: Trunnion Valves Dominate Extreme Pressures

Floating ball valves hit a hard limit at ANSI Class 600 (≈1,440 psi for 2-inch valves) because their unsupported ball deforms or damages seats under higher stress. Even “high-pressure” floating models max out at ANSI Class 900 (≈2,160 psi) and only for small diameters (≤2 inches).

Trunnion ball valves, by contrast, are engineered for ultra-high pressure:

Standard trunnion models handle ANSI Class 1500 (≈3,600 psi) and 2500 (≈4,200 psi)—matching the pressure tolerance of 2205 duplex steel bodies .

Specialized trunnion designs (e.g., forged 2205 duplex steel) reach ANSI Class 4500 (≈8,000 psi) or even subsea-rated pressures (10,000+ psi for offshore applications).

Why it matters: High-pressure systems like oil wellheads or hydraulic presses require valves rated for 3,000+ psi—floating valves can’t meet this without risking catastrophic failure.

2. Sealing Reliability: Trunnions Avoid Leaks and Seat Damage

Leakage is a fatal flaw in high-pressure systems (e.g., natural gas pipelines, where even tiny leaks are explosive). Floating valves struggle here:

Their pressure-driven sealing fails if line pressure fluctuates (e.g., sudden drops reduce ball-seat contact, causing leaks).

High pressure wears seat surfaces over time—once seats degrade, the valve can’t seal, even after replacement.

Trunnion valves use pressure-independent sealing (critical for high-pressure reliability):

Spring-loaded or double piston effect (DPE) seats maintain consistent contact with the ball, regardless of pressure spikes or drops.

Metal-to-metal seats (common in trunnion models) are machined from 2205 duplex steel—matching the valve body’s strength and corrosion resistance . They withstand 315°C+ temperatures and avoid degradation from aggressive fluids (e.g., hydrogen sulfide in oil pipelines).

Trunnions eliminate seat stress, so seats last 3–5x longer than those in floating valves (reducing leakage risks between maintenance cycles).

3. Operating Torque: Trunnions Reduce Wear and Failure Risk

Torque (the force needed to open/close the valve) skyrockets with pressure in floating valves:

As pressure pushes the floating ball against seats, friction increases—requiring larger actuators or manual effort.

Excess torque causes two critical failures:

Valve 抱死: The ball sticks to the seats, making operation impossible (a common issue in high-pressure gas pipelines ).

Stem damage: Torque overload bends or breaks the stem, leading to catastrophic leaks (floating valves lack the anti-blowout stem design of trunnion models ).

Trunnion valves minimize torque:

Trunnions support the ball, so only minimal force is needed to rotate it (torque is 50–70% lower than floating valves at the same pressure).

Lower torque reduces actuator size, cuts energy costs, and eliminates 抱死 /stem failure risks—critical for 24/7 automated systems (e.g., remote offshore platforms).

4. Size Scalability: Trunnions Work for Large-Diameter High-Pressure Pipes

High-pressure systems often use large-diameter pipes (4+ inches) for oil/gas transmission or wastewater treatment. Floating valves fail here because:

Larger balls (6+ inches) are heavier—high pressure pushes them harder against seats, making operation impossible (even with actuators).

Floating valve bodies for large diameters can’t handle pressure-induced stress (they deform or crack at ANSI Class 600+).

Trunnion valves scale seamlessly to 48-inch diameters (or larger) at high pressure:

Trunnions support heavy balls, so even 12-inch 2205 duplex steel balls rotate smoothly at ANSI Class 2500.

Forged trunnion bodies (common in industrial models) use the same dual-phase microstructure as 2205 steel—delivering 620 MPa tensile strength to resist deformation .

5. Longevity & Maintenance: Trunnions Lower Total Cost of Ownership

High-pressure valves are expensive to replace—longevity and low maintenance are key. Floating valves have higher lifecycle costs:

Seats need replacement every 6–12 months (vs. 2–3 years for trunnion valves).

Torque-related failures (e.g., stem breaks, 抱死) require emergency shutdowns—costing $10,000+ per hour in downtime .

Trunnion valves reduce maintenance by 70%:

Trunnion-mounted balls and metal seats resist wear, even in abrasive high-pressure slurries (e.g., mining wastewater).

Many trunnion models include automatic lubrication ports and valve cavity pressure relief valves—preventing pressure buildup (a common cause of floating valve failure ).

The fixed trunnion design avoids alignment issues, so the valve maintains performance for 15+ years (vs. 3–5 years for floating valves in high pressure).

When to Choose Which? High-Pressure Decision Guide

Scenario	Trunnion Ball Valve	Floating Ball Valve
Pressure Range	ANSI Class 600–4500 (1,440–8,000 psi)	ANSI Class 150–300 (150–720 psi)
Pipe Diameter	4+ inches (scalable to 48+ inches)	≤2 inches (max 6 inches for low pressure)
Fluid Type	Aggressive (oil, acid, gas), abrasive slurries	Clean liquids (water, coolant)
Operation	Automated (24/7), frequent cycling	Manual, infrequent use
Industry	Offshore oil/gas, chemical processing, power generation	HVAC, low-pressure water treatment, light industrial

Final Verdict: Trunnion Ball Valves Are Better for High Pressure

Floating ball valves are cost-effective for low-pressure, small-diameter systems—but they’re a liability in high-pressure industrial environments. Trunnion ball valves’ mechanical anchoring, pressure-independent sealing, and low torque design address every high-pressure pain point: they avoid leaks, resist failure, scale to large pipes, and lower long-term costs.

For applications where pressure exceeds ANSI Class 600 (or reliability is non-negotiable), the trunnion ball valve isn’t just a better choice—it’s the only choice. Pair it with a 2205 duplex steel body (for corrosion resistance) and metal-to-metal seats, and you get a valve built to thrive in the harshest high-pressure conditions.

September 29, 2025/by stvvalve

Are ASTM A217 WC6 gate valves right for you

To determine if ASTM A217 WC6 gate valves are right for your application, you need to align their material properties, design strengths, and operational limits with your specific system requirements—such as pressure, temperature, fluid type, and industry standards. Below is a structured breakdown of their key characteristics, ideal use cases, limitations, and critical questions to guide your decision.

First: What Are ASTM A217 WC6 Gate Valves?

ASTM A217 is a standard that specifies cast alloy steels for pressure-containing parts in valves, flanges, and fittings (primarily for high-temperature service). The “WC6” designation refers to a specific alloy composition:

Base metal: Chromium-molybdenum (Cr-Mo) steel (≈1.25% chromium, 0.5% molybdenum).
Core traits: Excellent high-temperature strength, good corrosion resistance (for non-aggressive fluids), and compatibility with high-pressure systems.

Gate valves, by design, use a vertical “gate” (disc) to control flow—ideal for full-open or full-close service (not recommended for throttling, as partial opening causes seat erosion). When paired with WC6 material, these valves are optimized for harsh, high-temperature industrial environments.

Key Advantages of ASTM A217 WC6 Gate Valves

Their value lies in solving challenges unique to high-temperature, moderate-pressure systems. Here’s what makes them suitable for specific applications:

Exceptional High-Temperature Performance
WC6 alloy retains mechanical strength (tensile, creep, and fatigue resistance) at elevated temperatures—up to 1,000°F (538°C) for continuous service. This far exceeds carbon steel valves (which typically max out at 600–700°F) and makes WC6 gate valves ideal for systems where heat would degrade other materials (e.g., steam pipelines, boiler feedwater).
Good Pressure Rating Compatibility
WC6 gate valves are commonly rated for ANSI Class 150 to Class 600 (and higher for custom designs), matching the pressure demands of industrial processes like power generation, refining, or chemical processing. Their cast construction ensures uniform strength across pressure-containing parts, reducing leak risks under high pressure.
Resistance to Oxidation & Moderate Corrosion
The chromium content in WC6 forms a protective oxide layer on the valve’s surface, resisting oxidation (rusting) at high temperatures. While not as corrosion-resistant as stainless steel (e.g., 316L), WC6 performs well with non-aggressive, clean fluids (e.g., steam, hot water, light oils, or air). This makes it a cost-effective alternative to more expensive alloys (e.g., Hastelloy) for non-corrosive high-temperature systems.
Cost-Effective for High-Temp Service
Compared to higher-grade Cr-Mo alloys (e.g., WC9, which has 2.25% Cr for even higher temps) or nickel-based alloys, WC6 offers a balance of performance and affordability. For applications where temperatures don’t exceed 1,000°F, WC6 avoids the premium cost of over-specified materials while still meeting reliability needs.

Ideal Use Cases for ASTM A217 WC6 Gate Valves

WC6 gate valves excel in industries and systems where high temperature is the primary challenge, and fluids are non-corrosive or mildly aggressive. Common applications include:

Industry	Specific Applications
Power Generation	Steam lines (boiler steam, turbine cooling), feedwater systems, and auxiliary steam.
Oil & Gas (Refining)	Hydroprocessing units (e.g., catalytic cracking), hot oil pipelines, and heater drains.
Chemical Processing	Non-corrosive solvent handling, high-temperature reactor feed lines (e.g., methanol).
Pulp & Paper	High-pressure steam for drying processes or boiler systems.
Industrial Heating	Hot water circulation loops (e.g., in manufacturing plants) or thermal fluid systems.

Limitations: When WC6 Gate Valves Are NOT Right for You

WC6 gate valves have clear boundaries—using them outside these limits will lead to premature failure, leaks, or safety risks. Avoid them in these scenarios:

Corrosive or Aggressive Fluids
WC6 is not designed for corrosive media like:
- Acids (sulfuric, hydrochloric, nitric acid).
- Alkalis (caustic soda, ammonia).
- Saltwater or chloride-rich fluids (e.g., offshore marine systems).
- Halogens (chlorine, fluorine).
  Alternative: Use stainless steel (ASTM A351 CF8M) or nickel-alloy valves for corrosion resistance.
Throttling Service
Gate valves rely on a tight seal between the gate and seats for full flow/closure. Partial opening (throttling) creates high-velocity fluid turbulence that erodes the seats and gate, leading to leaks.
Alternative: Use globe valves, butterfly valves, or control valves for flow regulation.
Extreme Temperatures (Above 1,000°F)
WC6’s strength degrades above 1,000°F. For systems with temperatures up to 1,200°F (e.g., superheated steam in advanced power plants), use WC9 (2.25% Cr-Mo alloy, also per ASTM A217) or nickel-based alloys (e.g., ASTM A494 CN7M).
Low-Temperature Environments (Below -20°F)
WC6 becomes brittle at sub-zero temperatures, increasing the risk of cracking under pressure.
Alternative: Use low-temperature carbon steel (ASTM A216 WCB) or stainless steel for cryogenic service.
Abrasive Fluids
Fluids with solids (e.g., slurries, sand, or particulate matter) will scratch and erode WC6’s seats and gate, destroying the seal.
Alternative: Use slurry valves with hardened trim (e.g., ceramic or Stellite).

Critical Questions to Confirm if WC6 Gate Valves Fit Your Needs

Before choosing, answer these questions to align the valve with your system:

What is your system’s maximum operating temperature?
- If ≤1,000°F: WC6 is a strong candidate.
- If >1,000°F: Upgrade to WC9 or nickel alloys.
What fluid will the valve handle?
- If it’s steam, hot oil, or non-corrosive chemicals: WC6 works.
- If it’s acidic, alkaline, or salty: Choose a more corrosion-resistant material.
Will the valve be used for full open/close or throttling?
- Full open/close: WC6 gate valves are ideal.
- Throttling: Avoid—use a different valve type.
What is your system’s pressure rating?
- WC6 gate valves are available up to ANSI Class 600 (and higher for custom designs). Ensure the valve’s pressure class matches or exceeds your system’s maximum operating pressure.
Do you have industry-specific standards to meet?
- For example: Power plants may require ASME B16.34 (valve pressure-temperature ratings) or NACE MR0175 (for sour oil/gas). WC6 is compliant with these if paired with the right trim (e.g., low-sulfur materials for NACE).

Final Verdict

ASTM A217 WC6 gate valves are right for you if:

Your system operates at 1,000°F or below and moderate to high pressure (ANSI Class 150–600).
You’re handling non-corrosive, clean fluids (steam, hot oil, non-aggressive chemicals).
The valve is used for full-open/full-close service (not throttling).
You need a cost-effective alternative to higher-grade alloys for high-temperature applications.

They are not right for you if:

Your fluid is corrosive, abrasive, or your temperature exceeds 1,000°F.
You need to regulate flow (throttling) or operate in extreme cold.

By matching WC6’s strengths to your system’s needs, you’ll ensure long-term reliability, reduce maintenance costs, and avoid safety hazards.

September 16, 2025/by stvvalve

Company News

What Is a Ball Valve

The Ball valve is arguably the most used and popular. And there are good enough reasons behind this. People love to use it because of its variety of unique types and benefits. You may see or use them daily in different applications but never recognize them. Read on to learn everything about ball valves.

The Ball valve is a mechanical device used to control and direct the flow of various substances. In other words, it is a valve with a ball with a hole at its center that can open, close, and direct the media flow. It controls the flow with a lever and the rotation of the ball. The water bibcock (lever-type) in your house or garden is the best example of a ball valve.

From Mako Products – Superlok TV

Types Of Ball Valve

Brass Ball valves come in a variety of types with unique features. These types are made depending on many criteria, such as:

Body Construction: 1-piece, 2-piece, and 3-piece body. Here, body pieces define the number of body sections the valve has. For example, a 3-piece ball valve has two pipe connectors and the main body.

A number of ports: 2 and 3. The standard type is 2 ports, 1 inlet, and 1 outlet. But the 3 port design allows you to use 2 ports as inlet and 1 as outlet or vice-versa.

Ball Hole Size: Full bore, Reduced bore, and V-shaped. The diameter of a full-bore valve equals the pipe’s diameter. The reduced bore valve has a smaller hole than the pipe hole. And as the name implies, the ball of the V-shaped valve has a V-shaped design hole.

Ball Design: Floating and Trunnion Mounted. The ball floats inside of the valve in a floating ball valve. And the Trunnion is similar to the floating one but with spring-loaded seats.

Operation: Manual and Electric or Motorized. Most of the ball valves are operated manually. However, new types of electrical components are available that can be used automatically.

Ball Access: Side-entry and Top-entry. The entry direction specifies which side you can access the interior of the valve.

From SupplyHouse.com

Ball Valve Parts

A ball valve is made with different types of small components. Here is a summary of regular-type ball valve parts:

Firstly, you will notice a flattened Handle attached to the valve when you look at it. But sometimes, you will see a spinning handle instead of that sliding handle. The handle has a Nut with a Thrust Washer on the above. These two help to tighten the handle with the valve. Secondly, right underneath the handle, there is a Gland Nut. The gland nut ensures the watertight seal to prevent leakage while the system is on.

In addition, a metal rod named Steam connects the upper mechanism with the Rotary Ball inside the valve. The rotary ball is a round steel ball with a bore (hole) inside. It’s on the right in the middle of the valve body, while the two O-shaped seats surround it on both sides. You can consider the rest you see outside as the valve body. It has two ends: one is the inlet, and the other is the outlet. That is all a regular-type ball valve consists of. However, only the upper parts have been changed to motorized ones. The electrical component replaces the handle to automate the valve.

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Popular Ball Valve

How Does A Ball Valve Work?

A ball valve manages the flow of the substances and flow direction. The multi-port (3-way) valves can mix multiple media and send it in different directions. It does this with a brass rotary ball. Let’s see how.

It is a straightforward but effective trick. If the valve is closed, the ball hole is set opposite. When you slide the handle from 0 to 90 degrees, it will rotate the ball. Therefore, the ball holes will meet with the inlet and outlet holes. This will create a path for the media to flow. Finally, the media or substances will flow without any interruption.

Again, when you slide the handle in reverse, it will rotate back the ball. After that, the ball hole will move and seal the drain. As a result, the flow will stop. This is how a ball valve works.

Ball Valve Benefits

Ball valves have several distinct advantages over other types of valves. Such as:

It supports almost all types of media and ensures reliable sealing.

2. The structure is simple, so you can easily disassemble and repair it.

3. You can efficiently operate the valve by simply rotating the handle. Also, it offers quick on-off, which is very helpful in case of emergency.

4. Have a low-pressure drop and a reasonable rate of flow capacity.

5. The chances of corrosion or damage are low, so that it will serve you for a long time.

6. Available at low prices.

China 150LB Cast Steel Ball Valve,24 Inch API 6D Cast Steel Trunnion Mounted Ball Valves,API 6D Cast Steel Trunnion Mounted Ball Valves,2-Piece Trunnion Mounted Ball Valve,Cast Steel Trunnion Mounted Ball Valve Manufacturer with high quality and competitive price

Drawing of ball valves

Uses

The demand for Ball valves is expanding worldwide due to their various forms and excellent benefits. You can use them anywhere, from your home’s water bibcock to big industrial pipelines. For example, our daily life applications, like washing machines, dishwashers, plumbing systems, and outdoor hoses, use ball valves to control water flow. Also, industries such as oil, natural gas, pharmaceutical, ball valve manufacturing, vehicle wash systems, chemical, automotive, and many others… use ball valves for different purposes.

Above all, you have got a crystal clear idea about ball valves. And if you are about to set up a new application or something related, you will need ball valves. You have many options, but think carefully and choose the one that fits your needs.

Moreover, if you are considering buying and importing ball valves, do not forget the name Plumberstar. We, Plumberstar, are a professional brass valve manufacturer and supplier based in China. We have many other valves that will meet your needs, including high-quality ball valves. Without believing our words, see our products yourself and decide.

June 20, 2025/by stvvalve

Company News, News

Top Five Chinese Valve Brands

Top Ten Chinese Valve Brands

1. Suzhou Neway Valve Co., Ltd. (Brand: Neway)

Suzhou Neway Valve Co., Ltd. was founded in 1997. Neway has more than 200 experienced technical engineers who specialize in valve solutions. We use professional knowledge to help customers review valve specifications, customize and optimize application solutions, troubleshooting, etc.

2. China Nuclear Suval Technology Industry Co., Ltd. (Brand: China Nuclear Suval Valve)

The company was founded in 1997. It is a listed joint-stock company founded on the basis of inheriting the main business, brand, quality assurance, technology and management advantages of China National Nuclear Corporation Suzhou Valve Factory. The current registered capital is 20 million RMB 20 million. , Is the first listed company in China’s valve industry and nuclear industry system. Won the honorary title of Jiangsu Famous Brand.

3. Sanhua Holding Group Co., Ltd. (Brand: Sanhua)

Sanhua Holding Group Co., Ltd. was established in 1984 in Xinchang, a famous city in eastern Zhejiang, China. It is a large-scale private enterprise integrating scientific research, production, operation and service. The company has successively won the National Quality Award, China Famous Brand, China Well-known Brand, and many other honors and titles. Mr. Zhang Daocai, the founder of Sanhua Business, has also won many honors such as Chinese Master of Business Management and Chinese Outstanding Entrepreneur.

4. Zhejiang Chaoda Valve Co., Ltd. (Brand: Chaoda)

Chaoda was founded in 1984. The company is now a national key high-tech enterprise, a backbone enterprise of the Yongjia Pump and Valve Characteristic Industrial Base of the National Torch Program, a member unit of the supply network of Sinopec, CNPC, and CNOOC, a director unit of China General Machinery Industry Association, and China Valve Industry Association Vice-chairman unit, Zhejiang province tax credit AAA grade enterprise, Zhejiang province contract and trustworthy unit, Industrial and Commercial Bank credit AAA grade enterprise, Wenzhou key backbone enterprise, “Chaoda” won the title of Zhejiang Famous Brand and Zhejiang Famous Brand Product.

5. STV Valve Technology Group Co., Ltd. (Brand: STV)

STV Valve Technology Group Co., Ltd is a China Valve Company which was founded in 2003 and now their production line extends to a ball valve like a stainless-steel ball valve, a gate valve like a forged steel gate valve, a globe valve, a control valve, a plug valve and a butterfly valve made of carbon steel, stainless steel, duplex stainless steel, and alloy materials. Their goods comply with the current industry standards in compliance with ANSI, ASME, and API.

The products are of guaranteed high quality and fair price, these products have been under the brand name “STV” for the last 10 years. The exposure, popularity, and recognition of the STV brand worldwide have made it possible to rapidly become a well-known trade name that is acknowledged to be one of the leading industrial valve lines sold worldwide.

STV Valve is committed to meeting your needs and providing you with the right valve at the right price. They’ll have a valve that suits your needs and matches your budget. When you buy from STV, you purchase from dedicated professionals who are committed to customer satisfaction.

June 20, 2025/by stvvalve

Company News, News

2025 Top Industrial Valve Manufacturer in China

The industrial valves market in china is projected to report substantial growth in the coming years due to new industrial infrastructure construction ventures, reconstruction and restoration of existing businesses, and extension of the gas pipeline network.

Few factors that market growth depends on are.

The oil and gas sector has dominated the market and is expected to witness growth over the next few years due to growing oil and gas operations across the world.
Increased demand for automatic valves is expected to be an advantage in the future.
Asia-Pacific was the dominant market in the world, with the highest intake from countries such as China and India.
Reports suggest that the industrial valve market globally is expected to grow up to US$ 85.19 billion by 2025.

Market these days have a large number of manufacturers and it is quite a task for consumers to select a valve as per their requirements and budget by maintaining proper quality.

If you have the same questions, you’re in the right place. This article provides you with top valve manufacturers in China. We’ve got suppliers of about any sort of valve you need. Read on and pick the best valves for your application.

We are providing a list of suppliers which are best in a selected application by:

Structure i.e., types of the valve by design.
Power i.e., types of the valve by an operation.
Condition i.e., types of the valve by system parameters.
Function i.e., types of the valve as per their use.

Classified By Valve Structure.

Top Ball Valve manufacturers in China.

Lanzhou High-Pressure Valve Co. Ltd

Established: 1938

Business Type: Exporter, OEM Supplier, Manufacturer.

Valve Types: Floating & Trunnion Mounted Ball Valve.

Certification: TS licensing A1, A2, B1, B2, API-6D, CE, ISO9001, ISO14001, OHSAS18001, TUV issued by the API 6FA gate valve, API607 ball valve fireproof test.

Lanzhou High-Pressure Valve Co., Ltd (formerly Lanzhou High-Pressure Valve Factory, short for LZHPV) associated with the Langao Group of companies, was a state-owned company founded in 1938, established as non-public enterprises in 2003 with strong support from the provinces, municipalities, and departments of districts at all levels, LZHPV was only one high-tech company in northwest China combining ‘high & low temp., high pressure, high alloy, large diameter’ valves with teams dedicated for R&D, design, manufacturing, and sales.

LZHPV currently has 178 sets of machinery for the processing center, CNC machine tools and cutting processing, 98 sets of physical and chemical machinery, NDE and PMI machinery, with superb technology, modern management principles and enhanced quality assurance method, LZHPV has established a leading role in the domestic valve industry in technology.

LZHPV invested heavily in the development of high high-pressure high-alloy valve patent industrialization ventures, and the project obtained funding from the National Development and Reform Commission, Ministry of Industry and Information Technology, for key industries and technological transformation.

Sanhua Valve-Zhejiang Sanhua Co. Ltd

Established: 1984

Business Type: Exporter, OEM Supplier, Manufacturer.

Valve Types: Floating & Trunnion Mounted Ball Valve.

Certification: CQC, CE, TUV, UL, VDE, ISO9001, ISO14001, QC080000, ISO10012.

In China, Sanhua is one of the leading producers of reliable and robust ball valves. With more than 30 years of experience in creating control components for automobile, appliance, and HVAC&R industries for major companies.

Sanhua has worked with giant air conditioning and refrigeration firms over the years. These include Mitsubishi, Samsung, Panasonic, Fujitsu, Hitachi, Carrier, York, Daikin, LG, Haier, Midea, and Gree, etc.

The company provides a range of SBV ball valves for industrial air conditioning, freezing or deep-freezing devices, cooling circuits, vacuum pumping, injection of refrigerants, and more.

Top Gate Valve Manufacturers in China.

Sufa Technology Industry Co., Ltd

Established: 1997

Business Type: Exporter, OEM Supplier, Manufacturer.

Valve Types: Cast Steel, forged steel, Cryogenic, Slab & Pressure Gate Valve.

Certification: API 6D, API 600, API 602, ISO 9001, ISO 14001 Certifications.

Sufa is one of the leading industrial steel valve manufacturers in China. Their valves are supplied for a wide variety of power generation, chemical and petrochemical, oil and gas, pulp and paper, mining, and shipbuilding applications. They focus on one business, developing, manufacturing, and marketing advanced steel valve technology in a wide variety of styles and sizes. Their products are made according to certain globally agreed specifications such as API, ANSI, DIN BS, AND JIS, and contain different types of valves in various materials.

China Yuanda Valve Group Co. Ltd.

Established: 1994

Business Type: Exporter, OEM Supplier, Manufacturer.

Valve Types: Cast Steel, forged steel, Cryogenic & Pressure Gate Valve.

Certification: API 6D, API 600, API 602, ISO 9001, ISO 14001, WRS, EAC Certifications.

Yuanda Valve Group Co., LTD. Used the short 30 years to raise and grow at a pace of 100 times. They are going forward with time, upgrading facilities, elaborately sculpting the brand, concentrating on creating high-end goods, and aggressively reacting to consumer demands with imagination. Every move they make is a breakthrough in the valve industry in China.

In recent years, Yuanda has witnessed an increasing recognition in the engineering and international fields, developed a long-term and stable partnership of cooperation with renowned companies and several transnational groups in areas such as oil, petrochemicals, water conservation, and steel, and has made this vision a reality. Yuanda attaches importance to after-sales services, continues to develop the after-sales service mechanism: Yuanda’s philosophy of service is to remain customer-oriented and provide prompt response and quality services.

STV Valve Technology Group Company

Established: 2003

Business Type: Exporter, OEM Supplier, Manufacturer.

Valve Types: Cast Steel, forged steel, Stainless steel, Bellow seal & Pressure Gate Valve.

Certification: ANSI, API 602, API 600, ISO 9001, etc.

WELCO Valve Co. Ltd.

Established: 2009

Business Type: Exporter, OEM Supplier, Manufacturer.

Valve Types: Swing Check, Lift Check, Dual Plate, Single Check Valve.

Certification: ISO 9001:2008 EN, ISO 9001:2008 CN, EC Certification Etc.

WELCO valve is among the leading manufacturers in China specializing in the design, production, selling and after-sales of industrial valves, such as check valve, butterfly valve, gate valve, globe valve, ball valve, bellow seal valve, pressure seal valve, API 602 forged steel valve, API 603 corrosion-resistant valve, strainer. It comprises two machinery workshops, one assembly workshop, one synthetic finished warehouse, and one semi-finished warehouse.

It has a modernized research and development team for its valve devices. In every move, they strictly comply with ISO9001 procedures. Now the Welco valve co. has the capability to produce high temperature and high-pressure valve series for all forms of the valve.

The organization has complete precision casting molds for internal components, integrated physical and chemical inspection instruments, experimental devices, and research techniques, as well as CAD production skills that ensure our output is always at the highest standard.

NTGD Valve Co. Ltd

Established: 2005

Business Type: Exporter, OEM Supplier, Manufacturer.

Valve Types: Swing Check, Lift Check, Dual Plate, Single Check Valve.

Certification: ISO9001/ ISO14001/ ISO18001 certified.

NTGD valve is an ISO 9001 certified company who was founded by a team of people with more than 30 years of experience in the supply of industrial valve. During these years NTGD valve has been adapting the media to new technologies. All this has allowed NTGD to provide the finest quality products and services to match the need of their clients.

NTGD Valve considers product quality and customer satisfaction as their highest priority. NTGD valve looks forward to a new client relationship by providing top-quality valves and close cooperation.

Affordable pricing and efficient distribution options make NTGD the top choice among valve manufacturers. NTGD valve specialized in valve supplies, including ball valve, gate valve, globe valve, check valves, strainer, plug valves, and butterfly valves in carbon steel, stainless steel, duplex stainless, and alloy materials. Their products conform to the latest industry standards in accordance with ANSI, ASME, API, and DIN.

Top Globe/ Stop Valve Manufacturers in China

Chaoda Valves Group Co. Ltd.

Established: 1984

Business Type: Exporter, OEM Supplier, Manufacturer.

Certification: ISO9001/ ISO14001/ ISO18001, ANSI, API, DIN, JIS & GB certified.

CHAODA Valves Co.Ltd Group. , as of the 16 Vice President Unit Companies of China Valve Industry Association, was established in 1984, with plant facilities area 32566 sq m, 512 machine workers. Items cover Metal-to-metal sealing ball valve, lock valve, cryogenic valve, bellow sealing valve, wafer check valve, high-pressure anti-corrosion control valve, an integrated three-way valve, and other general valves of types ball valve, gate valve, control valve, globe valve, and butterfly valve according to ANSI/API, BS, DIN, JIS, and GB specifications. Those are extensively used in petroleum, pharmaceutical, natural gas, coal chemical, polysilicon, metallurgy, power generation industries.

As a reputable provider of quality and service, CHAODA VALVES has received strong reputations from consumers in Europe, America, Japan, South Korea, Russia, South East Asia, and other countries in the Middle East. CHAODA made revenue of RMB 475 million (equivalent to USD 78 million) in 2013, of which USD 20 million came from the overseas market.

Tianjin Dazhan Group Co. Ltd

Established: 1976

Business Type: Exporter, OEM Supplier, Manufacturer.

Valve Types: Outside/Inside Screw Stop, Flanged Brass Stop Valve, etc.

Certification: ISO9001/ ISO14001 certified.

TIANJIN DAZHAN GROUP CO., LTD. was founded in 1976. It is a group of companies that facilitates scientific research & development, shipping, domestic sales, and the international market. The local business in the Dazhan industrial region of the Tianjin Jinnan district. It has an occupancy area of 300,000m2 and a building area of 170,000m2. The overall capital shall be RMB500,000,000. Annual sales receipts are over RMB1,000,000,1000.

The company is accredited in compliance with ISO 9001 Quality Framework. It has 56 offices and the goods are well supplied in China. Some products are exported to Korea, the United States, Russia, the countries of Africa and the Middle East, etc.

The key products of the company are low, medium, and high-pressure valves, malleable iron pipe fittings, wire mesh, asphalt, resin, medium and high-end coatings, PP-R pipes and fittings, etc. There are more than 150 series of valves and more than 4000 standards. The material of the valve is cast iron, brass, carbon steel, stainless steel, and plastics, etc. They are commonly used in a range of media such as water, oil, and steam, etc.

Beifa Technology Group Co.,LTD

Established: 2011

Business Type: Exporter, OEM Supplier, Manufacturer.

Valve Types: Stainless Steel Threaded Globe Valve etc.

Certification: ISO9001/ ISO14001 certified.

Yuzheng Valve ensures stringent production and has a competent distribution staff to ensure prompt and reliable production. Yuzheng has been making high-quality globe valves since 2011.

All of their goods are certified according to ISO9001 & CE. They produce stainless steel globe valves, which are durable, have a limited opening height, and are easy to mount.

Yuzheng globe valves can be used in low, medium, and high-pressure settings. The sealing surface of the valve disk and the valve seat are carefully fitted to avoid leakage.

Top Butterfly Valve Manufacturers in China.

Hanyang Industrial Co. Ltd.

Established: 2009

Business Type: Exporter, OEM Supplier, Manufacturer.

Valve Types: Wafer Type, Lug Type, Semi Lug Type Butterfly Valve, etc.

Certification: ISO9001/ ISO14001 certified.

Fengcheng Hanyang Industry Co., Ltd is a high-tech business that combines manufacturing, research, and development, distribution, and support. They have 5000 tons of resin castings bonded sand mold production line; it can make the casting surface roughness and size precision raise 2-3 levels. The company also has 15 CNC numerical control machining centers, two CNC machining centers, and supplies of electrostatic spraying machines and equipment from South Korea. They are made of gray cast iron, ductile cast iron, cast steel, pipes, valves, and their accessories, etc.

The goods refer primarily to petroleum, petrochemical, natural gas, metallurgy, power plants, paper mills, food, sewage treatment, and other areas. And we have formed strong cooperative relationships with South Korea, the United States, Europe, and the Middle East, and other producer countries.

They are recognized as China Butterfly Valve Factory and Butterfly Valve Factory, their products are gray cast iron, ductile cast iron, steel casting, valve gearbox, Butterfly Valve, valves, and accessories, etc. The Butterfly Valve refers primarily to petroleum, petrochemical, natural gas, metallurgy, power plants, paper mills, food, sewage treatment, and other areas. They’ve got two of their casting foundries and a CNC machining plant. That the organization will specifically offer the best aggressive price and the best goods.

NEWAY Valve

Established: 1997

Business Type: Exporter, OEM Supplier, Manufacturer.

Valve Types: Concentric, Double & Triple offset Butterfly Valve, etc.

Certification: API 602, ISO 9001:2008, CETS licensing A1, A2, B1, B2, API-6D, API 603, CE, ISO 9001, ISO 14001, OHSAS 18001, TUV issued by the API 6FA gate valve, API607 ball valve fireproof test.

Neway Valve is one of China’s top makers of butterfly valves. It has a world-class valve plant that covers a comprehensive valve program to satisfy the demands of its customers.

The entire design process of the business is carried out in-house, allowing them to ensure the consistency of their goods. They have their research and development center, three foundries, and a high-end manufacturing and testing facility.

Neway butterfly valves are available in a range of series including the T series for concentric butterfly valves, the TB series for double offset butterfly valves, and the TC series for triple offset butterfly valves. You ought to know the difference between the double butterfly valve offset and the triple offset butterfly valve.

These valves are commonly used in the chemical, nuclear, offshore, oil and gas, refining, and air separation industries. Neway Valve also produces door valves, globe valves, control valves, ball valves, and butterfly valves.

Zhuzhou Southern Valve Co. Ltd

Established: 1996

Business Type: Exporter, Supplier, Manufacturer.

Valve Types: Concentric, Double & Triple offset Butterfly Valve, etc.

Certification: ISO 9001, ISO 14001-2004, UKAS, CE, TS

Zhuzhou Southern Valve specializes in providing safety solutions for water delivery and diversion facilities for safety programs. For more than 20 years, the organization has developed productive water source protection system equipment and technologies for water diversion programs.

Zhuzhou is also renowned internationally for having systematic solutions to water hammer issues. They are often known for the development of various water valves with high pressures and large diameters.

The company produces butterfly valves specifically designed for water resources, sewage disposal, installation of water and wastewater facilities, municipal water and drainage systems, commercial water cycles, thermal and hydropower plants.

The firm sells advanced flange, wafer, heavy hammer, and large diameter butterfly valves designed for water treatment.

Top Control valve Manufacturers in China

Shanghai Shinjo Pump & Valve Co., Ltd.

Established: 2010

Business Type: Exporter, Supplier, Manufacturer.

Valve Types: Electric, Hydraulic, Pneumatic control valve, etc.

Certification: API fire test inspection, ISO, and CE certificates. Here shows the API 607 fire-safe certificates, ISO 14001:2004 Certification, API 6D Certification, ISO 9001:2008 Certificate, GB/T 28001-2001 Certification, and CE type-examination certificates.

Shinjo Company is a high-tech company specializing in the manufacture of various industrial valves. Shinjo aims to provide customers with a complete package of industrial valve solutions, focusing on industrial valve production, growth, sales, and services. With their hard work, Shinjo has built an individual, distinctive valve market. Products are commonly used in petroleum, chemical, electrical, shipping, mining, water supply, manufacturing systems, etc. Shinjo products are commonly used in various manufacturing sectors, such as chemical processing, environmental conservation, civil engineering, and metallurgical engineering.

Xiamen Dervos Valves Industry Co. Ltd

Established: 2008

Business Type: Exporter, Supplier, Manufacturer.

Valve Types: Electric, Hydraulic, Pneumatic control Valve, etc.

Certification: Certificates of ISO9001, API607, etc.

Xiamen Dervos Valves Industry Co., Ltd is a one-stop industrial valve manufacturer founded in June 2008. They combine R&D, manufacturing, capital integration, and market services into one. For 12 years, they have been dedicated to seeking options for their clients and offering a quality support to both general and specialist valves.

Dervos products cover nearly all forms of the valve in all sectors and can satisfy many basic and finer specifications of their customers. They assume that they have the opportunity to provide their market customers with the most stable product and professional support at a fair price.

The company produces control valve sizes ranging from 1/2′′ to 60′′ and pressure rating varying from ANSI/ASME Class 125 to Class 4500 and UNI PN6 to PN400. Control valves are produced of alloy steel, stainless steel, carbon steel, and more. You will find pneumatic and electrical control valves that fulfill the specifications of industries such as manufacturing, chemical, oil and gas, petrochemical, upstream and offshore, shipbuilding, power plants, water storage, and electricity generation.

China Valves Technology (Changsha) Co. Ltd

Established: 1958

Business Type: Exporter, Supplier, Manufacturer.

Valve Types: Steam Control, Three-way Control, Plunger valve, Sleeve control Valve, etc.

Certification: API 6D, API 6D SS, API 6F, ANSI API 607, ISO 9001, ISO 14001, OHSAS18001.

China Valves Technology (Changsha) Co., Ltd. is a major producer of valve systems integrated into the field of research, design, production, selling, and operation in China. They have a really strong executive staff and a technology team. They have a globally recognized business technology hub in the valve sector of China. With a wide range of products, innovative technologies, solid R&D, and manufacturing capabilities, they will offer a holistic fluid solution for all their customers both domestically and abroad.

The company produces high-quality control valves that are used in large and medium-scale ventures in thermal power plants, hydropower, water diversion, metallurgy, irrigation, water, heating, and petrochemical industries, among others.

The organization has a sleeve valve, a vapor control valve, a three-way control valve, a plunger valve, and other advanced control valves. China Valves Technology sells automotive valves to more than 30 countries and regions worldwide.

Top Diaphragm Valve Manufacturers in China

Anhui Water Valve and Fitting Co., Ltd.

Established: 2012

Business Type: Exporter, Supplier, Manufacturer.

Valve Types: KB, Weir, Straight, Stainless steel, Pneumatic Diaphragm Valve, etc.

Certification: API600, API602, API609, BS5156, BS1873, API6D, ISO 9001, ISO 14001, etc.

ANWVF is one of China’s leading valve manufacturers that can carry out a full valve program to fulfill the needs and specifications of their customers.

ANWVF valves including ball valves, gate valves, globe valves, diaphragm valves, control valves, plug valves, and butterfly valves, etc. Built from cast iron, carbon steel, stainless steel, duplex stainless steel, and alloy steel. Their goods conform with the current industry norms in line with BS, ANSI, AWWA, API, JIS, DIN, GOST, etc.

Along with several years of foreign industry experience, the ANWVF valve has been sold to more than 50 countries worldwide!

Shanghai Shinjo Pump & Valve Co., Ltd.

Established: 2010

Business Type: Exporter, Supplier, Manufacturer.

Valve Types: Pneumatic, Corrosion resistant lined, Cast iron PTFE lined Diaphragm Valve, etc.

Certification: API fire test inspection, ISO, and CE certificates. Here shows the API 607 fire-safe certificates, API 6D Certificate, ISO 14001:2004 Certificate, ISO 9001:2008 Certificate, GB/T 28001-2001 Certificate, and CE type-examination certificates.

They include a variety of diaphragm valves including Cast Iron Diaphragm Valve, Ductile Iron Valve, Cast Steel, and Stainless-Steel Diaphragm Valve: Straight Through Type Valve, Weir Type Valve, Flanged Valve, and Threaded Ends Diaphragm Valve, etc. Every diaphragm valve is designed, manufactured, and inspected to API, ASTM, ANSI, JIS, Noise, and BS specifications.

Tianjin Exxon Valve Co. Ltd

Established: 2007

Business Type: Exporter, Supplier, Manufacturer.

Valve Types: Handle, Cast Iron, PTFE lined, Stainless Steel, PVC Diaphragm Valve, etc.

Certification: Certificates of ISO9001, API607, etc.

Tianjin Exxon Valve Co., Ltd focuses on the design, development, manufacture, and marketing of a broad variety of valve products primarily used in the water treatment, power generation, upstream oil & gas, petroleum processing, chemical & petrochemical, and paper & pulp industries. They deliver a range of Rubber Lined Concentric Butterfly Valves, PTFE Lined Diaphragm Valves, Resilient Seated Gate Valves, and Soft Seated Dual Plate Search Valves to satisfy your requirements. The organization helps its customers to select the right valve type according to the process requirements and the system needs of the valves.

The company has a registered fund of 128,000,000 RMB and operates robust computer-aided design programs and advanced computer equipment for manufacturing, processing, and testing. They are solely in compliance with the international quality framework standard ISO9001 for manufacturing. Their goods passed the CE quality management system checks.

EXXON valves are highly regarded at home and abroad. Even though there is a heavy rivalry on the market today, EXXON’s steady and productive growth is driven by a management principle that is, guided by science and technology, assured by consistency, adheres to sincerity, and aims for excellent service.

Top Safety Valve Manufacturers in China

NEWAY Valve

Established: 1997

Business Type: Exporter, OEM Supplier, Manufacturer.

Valve Types: Low Lift, Full Lift, Pilot operated Safety Valve, etc..

Neway Valve is one of China’s top makers of butterfly valves. It has a world-class valve plant that covers a comprehensive valve program to satisfy the demands of its customers.

Shanghai Valve Factory (SVF) Co.

Established: 1921

Business Type: Exporter, OEM Supplier, Manufacturer.

Valve Types: Superheater, Series VIII Spring, Pilot Operated, Bellow Seal Safety Valve, etc.

Certification: ISO9001/ ISO14001, ANSI, API certified.

Shanghai Valve Factory, also known as ShangFa, is one of the largest valve manufacturers in China. It was established in 1921 and has since worked on a variety of different ventures, including state-owned nuclear power plants, the CNPC Group, the Sinopec Group, the CNOOC Group, and other national and foreign projects. The company was the first manufacturer to receive certifications such as API, ISO 9001, TS Manufacturing License, GJB9001B Military Production System Certification, Design & Manufacturing License for Nuclear Pressure Equipment, CSS Marine Valves Manufacturing Approval, ASME Nuclear Committee Accreditation Type N and NPT, and others.

Xiamen Landee Industries Co., Ltd

Established: 1994

Business Type: Exporter, OEM Supplier, Manufacturer.

Valve Types: WCB, WCB Screwed, SS PRV, etc.

Certification: ISO9001, ANSI, API certified.

At XIAMEN LANDEE INDUSTRIES CO., LTD. you can find a wide variety of pipes, valves, pipe fittings, connectors, gaskets, and other spares for industrial use-more than 50 types of items available in over 400 sizes and 20 materials, in reality.

Protection Relief Valves manufactured by Landee are the perfect option for your industrial safety valve needs. Landee’s offers Safety Relief Valves in varying sizes, ranging from 2″ to 48.” Landee Pressure Safety Relief Valves are available in various grades, e.g., Cast Iron, Cast Steel, Stainless Steel, and are available in different types of Safety Relief Valves. If you need unique safety valve details, please contact and ask for your safety valve requirements.

Top Angle Valve manufacturers in China

Yuhuan B.T.BEST Air-Valve Co. Ltd

Established: 1996

Business Type: Exporter, OEM Supplier, Manufacturer.

Valve Types: Compression, CPVC Stop Valve, etc.

Certification: OQS certified.

Yuhuan Air-Valve was founded in 1996 and has since produced a variety of pneumatic valves for various industries. The company is currently headquartered in Yuhuan City, China, and has approximately 150 employees. The pneumatic angle valve is one of the most prominent angle valves in China. It has a high flow rate, low fluid resistance, simple design high life-cycle, and maintenance-free architecture. The valve is ideal for mediums with a gross viscosity of 600 mm2/s and is resistant to extreme temperatures and chemical corrosives.

Pneumatic angle valves can be used in can/bottle filling devices, rubber machines, laundry machines, beer manufacturing, garment industry, chemical industry, soda industry, vacuum technology, high-temperature sterilization, and more. Yuhuan Air-Valve also produces electric ball valves, shuttle valves, solenoid valves, filter valves, sushi valves, etc.

SHK Valve Group Co. Ltd

Established: 1921

Business Type: Exporter, OEM Supplier, Manufacturer.

Valve Types: Compression, CPVC Stop Valve, etc.

Certification: TS, PED 97/23/EC, ISO9001, GOST-R, TUV, ISO 15848-1, ISO14001, OHSAS18001, etc.

SHK makers of high-end industrial valves using the latest technologies and the latest R&D technology. Their angle valves are used in industries such as petroleum, steel, fertilizer, LNG, chemical, metallurgy, electricity, and more. All SHK goods are accredited TS, PED 97/23/EC, ISO9001, GOST-R, TUV, ISO15848-1, ISO14001, OHSAS18001. SHK valves are specifically built for extreme operating environments such as ultra-high pressure, ultra-high temp., high wear, emergency shut-off, volatile, flammable, high vacuum, anti-dissipation, low noise, and more. The organization has received many awards and qualifications over the years, including China Petrochemical Material Source Industry Participant, China National BlueStar Co., Ltd Nominated Supplier, China Petroleum and Gas Pipeline Bureau Certified Network Supplier, Certification Certificate of Nuclear Power Qin Mountain Qualified Supplier, Sinopec Natural Gas Network Access Licenses, Honoring Contract and Trustco.

AMICO Group

Established: 1989

Business Type: Exporter, OEM Supplier, Manufacturer.

Valve Types: Compression, CPVC Stop Valve, etc.

Certification: ISO9001, ISO14001, AS3688, AS3718, AS-MP52, CE, UL, KS, etc.

The Amico Group has over 30 years of experience in the automotive valve industry. The company is investing heavily in R&D to create valves that meet the unique needs of the market. They have a reputation for creativity and environmental growth. Amico makes brass angle valves of varying sizes and shapes. The angle valves are available in various finishes and colors. The three-way brass heating right angle valve can withstand a nominal pressure of 1.6MPa. All Amico products are accredited according to ISO9001, ISO14001, AS3688, AS3718, AS-MP52, CE, UL, and KS. They also export their products around the globe with an export commodity quality assurance qualification rate of 100 percent.

Top Pinch Valve manufacturers in China

Bofa Valve Co. Ltd

Established: 2010

Business Type: Exporter, OEM Supplier, Manufacturer.

Valve Types: Natural rubber Sleeve, Control Pinch Valve, etc.

Certification: API, GOST (ГОСТ), CE, EN, BS, DIN, TS, MSS SP, ISO, etc.

Xiamen’s Bofa Valve Co. Ltd is the largest manufacturer and retailer of a Chinese valve. The business has technical and distribution staff delivering high-quality automotive valves to South East Asia, Russia, Europe, and South America. The company is designing some of the best pinch valves in China. Their ductile iron, cast iron, rubber sleeve pinch valve comes with low maintenance, are cost-effective, and can withstand slurry, abrasive media and corrosive chemicals. It has a 100% full port configuration that means that mediums such as pulp, raw sewage, and cement powder are not trapped in any dead spots or valve cracks. Elastomer sleeve provides resistance to corrosion and abrasion while retaining a viable pressure in the valve. The Bofa Valve Class 150 regulation pinch valve provides precise control over stroke change. The valve can be controlled conveniently so that users can make minor adjustments to the area of control.

Landstar Valves

Established: 2012

Business Type: Exporter, OEM Supplier, Manufacturer.

Valve Types: Natural rubber Sleeve, Control Pinch Valve, etc.

Certification: API, DIN, ISO, etc.

Landstar is a brand of the group DI XIN VALVE. Before Landstar, DI XIN VALVE focused on producing knife valves and butterfly valves that were primarily used in slurry and water ventures. But in 2012, after Landstar was born, the company began to produce air pinch valves. The pinch valves are available in the PA and PP series and three types of materials, including POM, aluminum alloy, and stainless steel. The distinction between the two series is the form and material of the pinch valves. Landstar’s highlight is its natural rubber sleeve made using a top-secret recipe. This natural rubber sleeve is 1 million times longer than any other on the market. Landstar pinch valves can be used to separate or extract impurity that includes solids, ashes, or some other granules.

RESTA Valve China

Established: 1988

Business Type: Exporter, OEM Supplier, Manufacturer.

Valve Types: Air Operated, Slurry, Manual Pinch Valve, etc.

Certification: API 6D, API 607, ASTM, GOST, EN, ISO 158481, ISO 9001:2000.

Resta is among the largest maker of valves in China. It consists of two plants, one of which is devoted to the manufacturing of personalized valves such as DBB valves and pinch valves, while the other produces general use valves such as ball and gate valves. Resta air-powered pinch valves shut off the fluid by filling the air gap between the body of the valve and the rubber tubing and deforming the tube. The valve has no leaking or lack of pressure and features a high-quality sleeve that is resistant to abrasion, rust, wear, and fatigue. The firm also sells a manual pinch valve with excellent wear and corrosion resistance and a slurry pinch valve that is ideal for medium including dust, powders, and fibers.

Top Needle Valve Manufacturers in China

Nantong NACO Fluid Equipment Co., Ltd

Established: 2008

Business Type: Exporter, OEM Supplier, Manufacturer.

Valve Types: High Pressure, Angle, 3-way needle valve, etc.

Certification: CCS, CE, ABS, etc.

Naco Fluid Equipment Co., Ltd primarily manufactures instrumentation valves and tube fittings. The company is a self-importing company that has the requisite equipment for smooth production processes. Some of them include product selection manuals, CNC precision machining, molded material welding, metal surface treatment, and full testing of finished products. NACO Fluid Machinery manufactures some of the finest needle valves in China. Its valves are commonly used in industries such as nuclear power, chemical, marine engineering, equipment, petroleum, shipbuilding, metallurgy, electrical power, and more.

NACO valves can accommodate high-pressure, high-temperature applications and are resistant to corrosion. The NACO Super High-Pressure Needle Valve can withstand up to 30000psi of pressure. It is constructed with high-quality stainless steel, is manually operated, and can handle temperatures from 0°F to 450°F. It has a port size of 1/8′′-1′′ and can be used for oil, coal, water, and other media.

Shanghai KS Flow Control Equipment Co. Ltd

Established: 1984

Business Type: Exporter, OEM Supplier, Manufacturer.

Certification: ISO 9001, API 6D, CE, ISO14001, OHSAS18001, API 607, 6FA, API 600, etc.

KS Flow Control has over 30 years of experience in the valve business. They specialize in the production of needle valves that can be used in gasoline, natural gas, polysilicon, electrical, petrochemical, coal chemical, metallurgy, and other industries. The needle valves will act with oil, water, gas, and other non-corrosive media at temperatures between-20°C and +440°C-70°C between-240°C and ≤540°C and ≤570°C. The KS Flow high-pressure needle valve can withstand pressure up to 15000 psi. It has a durable bond-bonnet structure, a back seat shape, a mountable frame, a non-rotating stem tip, and a packing underneath the stem string.

In addition to needle valves, KS Flow Control also produces ball valves, gate valves, globe valves, control valves, and butterfly valves. They appeal to consumers across the world, such as Taiwan, Oman, Europe, and the United States.

Jiangsu YDF Valve Co., ltd.

Business Type: Exporter, OEM Supplier, Manufacturer.

Valve Types: High Pressure, Angle, 3-way needle valve, etc.

Certification: API 6d, API 600, API 602, ISO 9001, etc.

Jiangsu YDF Valve Co., ltd is situated in the YDF Industrial Zone, Shangzhuang Town, Yancheng City, Jiangsu Province , China. With a surface area of 21000m3 and a construction area of 7000m3, KOSEN has high technological strength, science, and sound management and advanced facilities, including a new quality detection and testing center, CAD valve design center and thermal operation, chemical analysis, spectrum analysis, metallographic analysis, mechanical performance testing, X-ray flaw detection, ultrasound flaw detection, etc. We still think that new equipment and identification means a lot to our ability to plan, produce and manufacture. Successively, we have received a range of international approvals, including ISO 9001:2000, CE, API 6D-0478, AZ.

Top Plug Valve Manufacturers in China

Chaoda Valves Group Co. Ltd.

Established: 1984

Business Type: Exporter, OEM Supplier, Manufacturer.

Valve Types: Lift Plug, American Standard Plug, National Standard Plug Valve, etc.

Certification: ISO9001, ISO14001, OHSAS18001, API6D, CE/PED, API607, API6FA, ISO 15848-1, TS, API 600.

Chaoda is one of the best manufacturers of plug valves in China. It requires a professional R&D staff, sophisticated machinery, and facilities, completely functioning physical & chemical analysis and inspection systems, and a high-tech knowledge processing system to satisfy the needs of its customers. Chaoda’s stainless steel plug valve provides superior sealing efficiency and durability. The valve can be quickly opened and closed by raising, which eliminates any pressure between the body and the seal. The valve is made of carbon steel, stainless steel, alloy steel, duplex stainless steel and can be powered by hand, gear, electrical or pneumatic actuation. It can be used for mediums such as water, tar, acetic acid, carbamide, steam, nitric acid, oxidizing agent, and more.

Xiamen Dervos Valves Industry Co. Ltd

Established: 2008

Business Type: Exporter, Supplier, Manufacturer.

Valve Types: RF Plug, Sleeve, Three-way Jacket Plug Valve, etc.

Certification: Certificates of ISO9001, API607, etc.

Dervos Valves are leading the way for high-quality industrial valves in China. As a multinational retailer, Dervos Valves is dedicated to designing and providing valves that satisfy the exact needs of its customers. The plug valve contains an upright pressure plug valve, a jacket plug valve, a 3-and 4-way plug valve, a soft sealing valve style sleeve, an orbit plug valve, and more. The plug valves are simple to control, economical and effective. Dervos’ butt welded plug valve can be made of carbon steel, stainless steel, and alloy steel. It can accommodate a PN16~PN100 pressure range and a working temperature of-29 °C~180 °C. It may be handwheel, magnetic, electrohydraulic, gearbox, pneumatic, and oil-powered actuated.

China Valves Technology (Changsha) Co. Ltd

Established: 1958

Business Type: Exporter, Supplier, Manufacturer.

Valve Types: Lift Plug, Sleeve, Three-way Jacket Plug Valve, etc.

Certification: API 6D, API 6D SS, API 6F, ANSI API 607, ISO 9001, ISO 14001, OHSAS18001.

China Valves Technology Co., Ltd is a subsidiary of CVVT. It has a predecessor, the Changsha Valve Factory, which was established in 1958 and was the leading manufacturer of the Chinese valve. It has a declared capital of $10,000,000 and a gross valuation of $25,000,000,000. CSV has more than 5 years of experience working in automotive valve development. They house top-of-the-line production, refining, and research equipment to help them manufacture high-quality automotive valves.

The CSV plug valve is constructed with ductile cast iron and can withstand pressure from 0.6Mpa to 1.6Mpa and a temperature range from-10°C to 80°C. The sealing surface is built of stainless-steel welding technology with strong corrosion resistance. The double eccentric structure provides good sealing quality, low flow resistance, and energy savings. The plug valve is used for flow control in the petrochemical, electrical, steel, municipal, and other industries.

Top Strainer & Filter Manufacturer in China

June 20, 2025/by stvvalve

Company News, News

Best Valve Suppliers in China

Leading Butterfly Valve Supplier of China

STV Valve Technology Group Co., Ltd is one of the top-notch china butterfly valve Supplier. The high-quality industrial butterfly valves we manufacture are hard to find anywhere else. We are the reliable partners of most of our clients as we supply them with the most durable, long-lasting, and cost-effective wholesale triple offset butterfly valves, no matter where they are located. The operating function of this valve is a disk that rotates. We as the verified butterfly valve suppliers china, promise you to provide on-time delivery, with all the required details.

Advantages of Our Supplier Butterfly Valves

STV VALVE is considered the best butterfly valve china manufacturers in the global industry because of the unlimited benefits it offers. These are;

✅ The compact structure of the butterfly valves needs considerably less space.

✅ They offer a tight bubble service.

✅ These valves are light in weight.

✅ They have high-pressured recovery and low-pressure drop..

✅ These are easy and fast to open.

✅ They require less maintenance.

Applications of Butterfly Valve

We are the reliable partners to international traders and acts as one of the top wholesale Butterfly valve suppliers china, provides valves that are highly precise and accurate and work with great efficiency. They are applicable in numerous sectors, including the following:

✅ Cooling water, gases, air, fire protection, circulating water, etc.

✅ Food processing, chemical, and pharmaceutical sectors.

✅ High-temperature and high-pressure water and steam services.

✅ Vacuum services.

✅ Throttling services requiring fewer differential pressures, like in air supply systems or cooling water.

Why Choose Triple Offset Butterfly Valves?

STV is the pioneer in making industrial disk for triple offset butterfly valves. Our valves are customized as per the application. With the superior quality of products, we offer our clients prime services. Our prices are market competitive and better quality in all ways. The valves we manufacture are durable and long-lasting. We meet the international standards of quality and thus the best china butterfly valve manufacturers.

Meet the Top China Industrial Forged Valve Manufacturer

STV Valve Technology Group Co., Ltd is a well-renowned name in the forged valve manufacturer industry. We proudly call ourselves the trendsetters of manufacturing the supreme quality of forged valves China. We, as the leading wholesale forged valve supplier, provide our clients with prime services and high-quality products. The forged valves we manufacture are so efficient in their performance. We manufacture lightweight, forged valves that are easy in handling and install. Its accurate structure ensures the sealing of the valves without any finishing.

Things that make China Forged Valve Supplier the Best in Town

Formen Valve manufactures the most perfect forged valves, which have a huge demand from every corner of the world.

1. The strength of the forged valves provided by China forged valve manufacturers makes them ideal for high-pressure and high-temperature systems.

2. The thickness of the forged valves helps in the reduction of thermal fatigue in between valve operations.

3. Also, the forged valves can be heated and cooled quickly, which allows them to appropriately handle the stresses of systems.

4. The fluid resistance of the forged valve is little.

5. Little external force is required for its opening and closing.

6. Its direction of flow is not limited.

7. The casting process is simple because forged valve manufacturers make a simple design.

Industrial & Commerical Applications of Forged Valves

The forged valves have various applications, especially in pipelines containing high temperatures and pressures like nuclear power plants, coal-fired power plants, petrochemical systems, etc. China Forged valve suppliers also provide them for applications in the water and heat supplying system of urban construction.

Why Choose Us?

STV Valve is a team of professional forged valve makers and reliable exporters. China forged valve manufacturers offer you the most durable products, and the quality is visible from its appearance. We quality check all our products and offer you the most flawless items. We as a leading China forged valve supplier also offers you different customizations according to your requirements at very cost-effective prices. We are the trustful partners of our customers as we never do anything to disappoint them and always meet their requirements.

China Gate Valve Manfacturer with Global Export Expertise

STV Valve Technology Group Co., Ltd excels in manufacturing premium quality wholesale gate valves manufacturer. We are the popular China gate valves suppliers worldwide because of our superior services and high-quality gate valves. Because of the top-quality of our gate valve, it is applicable in a wide range of industrial as well as commercial applications. We manufacture the most durable and robust China gate valve, which is much efficient in its performance. Moreover, we also offer customizations to our customers so that they can get the most benefit from us. Though we are located in China, our services are for everyone in the world as we have followers from every corner of the world. They rely on our products because the best of Gate valve China they attain from us are hard to find anywhere else.

Special Characteristics of Gate Valves

There are several things that make the gate valves of Formen the most exclusive:

The China gate valve has a straight-through type, so the fluid resistance of the valve is small.
The sealing performance of the gate valves is outstanding.
The application range is wide. It could be applied in liquid, steam, and oil media. Also, in media containing granular solid with huge viscosity.
The gate valve features a dual flow direction.

Applications of Industrial & Commercial Gate Valves

STV valve as a Top China Gate valve exporters makes supreme quality China gate valve manufacturers China that make them suitable for several applications like air, fuel gas, steam, feedwater, lube oil, and other systems. These are also suitable for low-temperature and low-pressure systems like fire protection systems as well as water piping distribution systems. Wholesale Gate valve suppliers provide the threaded-end gate valves, which are highly applicable for liquid, air, and gaseous systems.

Get Customized Gate Valve For Your Project!

We are pro in the manufacturing of different types of gate valves, including the custom gate valve and knife gate valve manufacturers in China. We offer you options to customize your own gate valve for your project. First, we get our knife gate valve China trialed under tough conditions and bring them to their best level and international quality standards.

What Is So Special About Our Gate Valves China?

We make the most superior valves that are not found anywhere else. The designs we manufacture suit its functionality. Also, we as the leading gate valves suppliers provide the valves at very economical ranges. We also offer installation and upkeep services to our supreme clients.

The Leading China Check Valve Manufacturer

STV Valve Technology Group Co., Ltd is one of the leading China check valve suppliers all around the world. We manufacturer the finest quality of safety China check valve that allows liquids and gases to flow in one direction. The axial flow check valves we manufacture are of superior quality and are long-lasting. The efficiency of our supreme hydraulic check valve is visible from its quality. We are popular worldwide not only for the top-quality Check Valves we manufacture but also for our prime trade services globally.

What Makes Us Best Hydraulic Check Valve Manufacturers?

There are numerous advantages of the check valves we deliver to you:

We as the well-reputed Check valve manufacturers in China provide you with self-actuated China check valve that need no external means to actuate the valve either open or close.

1. These are fast-acting.

2. They prevent backflow and maintains pressure precisely.

3. They also serve as a backup system.

4. These check valves can be employed horizontally as well as vertically.

Characteristics of China Check Valve

If you buy such industrial valves from a verified axial flow check valve manufacturer, then you can enjoy the following characteristics:

1. A check valve is also referred to as a non-return valve, retention valve, reflux valve, foot valve, or one-way valve.

2. A check valve is basically a one-way valve, and as the name indicates, it generally permits fluid (gas or liquid) to flow through the valve in a single direction only.

3. Check valves have two-ports, which means that they have two openings in their assembly, one for fluid to invade and the other for fluid to leave.

4. There are myriad types of check valves provided by the Formen that are employed in a great variety of applications in different sectors

5. Check valves are most commonly used for household items.

6. Check valves are very trivial, simple, and cost-effective.

7. These valves function automatically and are not regulated by any personnel or any external control.

8. The structure (outer shells) of most China check valves is made of metal or plastic.

9. A distinctive concept in check valves is their cracking pressure which is the minimum differential upstream pressure between outlet and inlet at which the valve will function.

10. Generally, the check valve is manufactured for and can therefore be specified for a particular cracking pressure.

Uses of Hydraulic Check Valve

Check valves are generally used as a backup in instances a pump fails. It assists the compressors and reciprocating pumpâ€™s function, and also when the system pressure surpasses the prime equipment capabilities. These check valves are applicable in various industries such as chemical, refining, petrochemical, etc. So, you must choose the reliable hydraulic check valve supplier for the purchase. Also, the check valves are used in oilfield production, water, steam, refining Petro, and viscous fluids. Check valves are also normally found in waste-water management systems and in production.

We as the top hydraulic check valve manufacturers in China make these top-quality valves, which are suitably applicable in the prevention of oil lines from draining, it blocks oil flow from the accumulator, and it stops the oil flow from the online and the offline pump.

Why Choose Our Manufactured Axial Flow Check Valve?

STV VALVE as a prominent axial flow check valve suppliers provide you with the supreme check valves, which are highly suitable for most applications. We, as the leading hydraulic check valve suppliers and exporters, works day and night to offer you the best products at very economical prices.

Top China Plug Valve Manufacturers at Wholesale Rates

STV Valve Technology Group Co., Ltd is the leading Plug Valve manufacturer in China. Though we are located in China, our prime services are for all our customers globally, regardless of location. As the best China plug valve supplier, we are popular worldwide because of the top-quality valves and promising services. In China, we manufacture these high-quality plug valves, a quarter-turn revolutionary motion valve. The plug valve employs a cylindrical or tapered plug to start or stop the flow. Our product can be customized as per the industry and customer requirements.

Plug Valves for Different Sectors

The Plug Valve China applies to many industries because of its unlimited benefits. As the leading China plug valve supplier, our products offer the following benefits for various sectors:

1. We provide these valves for low-pressure and low-temperature services. Sometimes, it also exists for high-pressure and high-temperature services.

2. We employ these high-capacity valves for directional flow control even in moderate vacuum systems.

3. We make valves that very efficiently handle fuel, liquid, and gas.

4. These valves, like boiler feed water, condensate, and other elements, efficiently tolerate extreme temperature flow.

5. These valves maintain the flow of liquids comprising suspended solids, such as slurries.

Benefits of the Plug Valve China

STV VALVE is a well-known China plug valve manufacturer, makes the best valves that perform their functions efficiently and effectively. Its benefits are visible from its performance. Out of the endless advantages of the plug valves, some of them are the following:

1. The plug valves have a simple structure with only a few components.

2. These valves close and open very conveniently.

3. The maintenance and repair of the plug valves are very easy and can be done in the area of operation.

4. It features low flow resistance.

5. It offers reliable leak-proof valves.

6. China plug valve suppliers provide these plug valves at very economical wholesale rates.

Easy Trading Options

With over 20 years of experience in this industry, we try every inch hard to satisfy our client’s requirements. We are prominent as the top China plug valve manufacturer globally. We have connections with various shipping agencies, which ease the delivery of products with minimum costs. Our business model is to connect directly with the buyer, which enables us to offer the lowest market rates. Our plug valves in China have high demand in the international market. Quote us for free today

June 20, 2025/by stvvalve

Company News, News

Double Block and Bleed (DBB) Valve Design and Features

A Double Block and Bleed (DBB) valve is a type of valve assembly used to isolate a section of a pipeline or system for maintenance, repair, or safety purposes, while also allowing for the draining or venting of the system to prevent hazardous situations. The “double block” refers to the use of two valves to isolate the flow path, while the “bleed” refers to a third valve that provides a venting or draining capability between the isolation valves.

Here are the key design features and components of DBB valves:

1. Basic Design and Functionality

Isolation Valves: Typically, a DBB valve features two isolation valves (usually ball valves or gate valves) arranged in series, which are designed to provide a double seal between the isolated section of the pipeline and the surrounding environment.
Bleed Valve: A third valve is incorporated between the two isolation valves, allowing any trapped fluid or pressure to be vented or drained. This prevents the build-up of hazardous or corrosive fluids and ensures safety before opening or working on the isolated section.

2. Components of a DBB Valve

Primary Isolation Valve (Upstream): The first valve is located upstream of the section to be isolated. It provides the first block against the flow of fluid.
Secondary Isolation Valve (Downstream): The second valve is positioned downstream of the isolated section. This valve provides an additional seal, further isolating the section.
Bleed Valve: Positioned between the two isolation valves, the bleed valve allows for venting or draining of the section to prevent fluid from accumulating or causing pressure hazards.

3. Valve Types Used in DBB Assemblies

Ball Valves: Common in DBB designs due to their ability to provide a reliable seal and their quick opening/closing action.
Gate Valves: Often used for larger systems where low-pressure drop and good shutoff capabilities are necessary.
Plug Valves: Sometimes used in specific applications where isolation and bleeding are needed in smaller bore pipelines.
Check Valves: In some configurations, check valves are incorporated to provide added safety by preventing backflow.

4. Advantages of DBB Valves

Increased Safety: DBB valves ensure a higher level of safety by providing two barriers (the double block) between the process fluid and the surrounding environment, preventing accidental releases.
Simplified Design: The DBB valve assembly simplifies the design of isolation and bleeding systems, reducing the need for multiple separate valves.
Reduced Risk of Leakage: With the double isolation, the risk of leakage is minimized, which is crucial in systems carrying hazardous, toxic, or flammable fluids.
Maintenance Flexibility: The bleed valve allows for safe draining, purging, or venting, which is essential when performing maintenance or replacing components.
Cost-Effective: By integrating the function of multiple valves into a single assembly, DBB valves reduce the number of individual components needed, lowering overall installation and maintenance costs.

5. Applications of DBB Valves

Oil and Gas: DBB valves are frequently used in the oil and gas industry, especially in wellhead systems, pipelines, and production facilities, to isolate parts of the system during maintenance or to safeguard against leaks of hazardous materials.
Chemical and Petrochemical Industries: Used to isolate reactors, storage tanks, or pipes carrying chemicals, ensuring no risk of fluid escape during maintenance or changes in operations.
Power Generation: Used in steam, water, and chemical systems to isolate sections for maintenance while ensuring the integrity and safety of the system.
Water Treatment: To isolate pipelines, pumps, or tanks while allowing for safe draining, particularly in wastewater systems.

6. Design Considerations

Pressure and Temperature Ratings: DBB valves must be designed to handle the maximum operating pressures and temperatures of the system they are installed in.
Leakage Requirements: The valves must meet strict leakage standards, often defined by industry codes like API (American Petroleum Institute) or ISO (International Organization for Standardization), to ensure that no hazardous fluid escapes during isolation.
Material Selection: The materials used in DBB valves need to be compatible with the fluids being handled. Common materials include stainless steel, carbon steel, and various alloys, depending on the corrosive nature of the fluid.
Size and Flow Capacity: The size of the DBB valve must be chosen based on the system’s flow rate, pressure, and other operational conditions. The valve should provide a low-pressure drop across the system when in the open position.
Valve Actuation: DBB valves can be manually operated or automated with actuators (pneumatic, electric, or hydraulic) for remote control, especially in high-risk environments.

7. Standards and Codes

DBB valves are often subject to various industry standards, including:

API 6D (for pipeline valves),
ASME B16.34 (for pressure–temperature ratings of valves),
ISO 5208 (for valve testing),
API 598 (for valve inspection and testing),
PED 2014/68/EU (Pressure Equipment Directive for Europe),
ATEX (for equipment used in explosive atmospheres).

8. Challenges and Limitations

Complexity: The design of DBB valves can be more complex than single valve isolation methods, requiring careful attention to sealing and proper venting.
Size and Weight: DBB valve assemblies can be larger and heavier than individual isolation valves, which may be a concern in tight spaces.
Cost: While DBB valves offer significant safety benefits, they tend to be more expensive than conventional single isolation valves, especially for high-performance and high-integrity systems.

9. Conclusion

The Double Block and Bleed (DBB) Valve is an essential valve assembly that ensures high safety, operational reliability, and ease of maintenance in critical systems. By incorporating two isolation valves and a bleed valve, it guarantees that the isolated section of a pipeline or system is fully sealed off from the environment and any trapped fluid can be safely vented. Whether in the oil and gas, chemical, or power industries, DBB valves provide a simple yet effective solution for isolating and maintaining high-risk systems.

November 12, 2024/by stvvalve

Company News, News

Cast Steel Gate Valve 600LB,10 Inch,API 600

We just delivered some Cast Steel Gate Valve 600LB to one of the South America clients.

Descriptions

Product Name	Cast Steel Gate Valve 600LB,10 Inch,API 600,Flanged End
1. Material	WCB
2. Size	10”
4. Port	Full Port
5. Working Pressure	600lb
6. Connection Ends	RF
7. Working Temp.	-29~425ºC,
8. Suitable Medium	Water, Natural Gas, Oil and some corrosive liquid
9. Operated	Handwheel
10. Inspection & Testing	According to API598

QTY:5PCS

If you are interested in the above valves, pls freely contact us via email:sales@stvvalves.com

Kindly, please find the attached GA drawings and pictures of valves.

Cast Steel Gate Valve 600LB

May 8, 2023/by stvvalve

Company News

What Is ANSI Flange Rating And Flange Class

Each pipe fitting retains a certain pressure holding ability that is determined by the type and thickness of the metal. A flange is one of the essential parts of a pipe that connects to industrial valves, tools, and other spools of piping and carries the pressure created in the piping system during the operation.

The term “flange pressure rating” refers to a particular classification that specifies the ultimate temperature at which a given flange can withstand a given amount of pressure. The utmost pressure a flange can resist with growing temperature up to a limit for a certain temperature span is indicated by the flange pressure rating or class.

The American National Standards Institute, also known as ANSI, is a nonprofit, independent association that assists in regulating the standards for a variety of goods, services, operations, and personnel. One can be sure to get the appropriate flange given the material and the maximum pressure and temperature to which it will be subjected by looking at the ANSI rating.

Seven flange pressure ratings are delivered by the ASME or ANSI B16.5 standard, which are: 150, 300, 400, 600, 900, 1500, and 2500. Additionally referred to as the flange class, they are identified by the class and observed by any of the dimensionless integers. The terms “pound rating” and “pressure class rating” are also used to describe them.

Here are some vital features of flange classes are:

If the flange rating is high, the more pressure and temperature flanged valve can resist.
In comparison to flanges with less grades, those with higher values are thicker, heavier, and stronger.
Because flange dimensions fluctuate as pressure rating classes change, a flange from one pressure class might not match with a flange from an elevated or lower class.
The number of bolts grows along with the pressure rating, boosting the bolt area. By improving the bolt’s capacity to carry force and moment, the gain in bolt area decreases the potential for flange leakage.

What To Know About ANSI Flange Pressure Rating Chart

Flanges, valves, and fittings are governed by a variety of standards, but ANSI pressure ratings are arguably the most widely used set of guidelines. There are seven distinct ANSI flange pressure ratings. The flange will be smaller, lighter, and less robust if the flange rating is less.

140 pounds psi is the most that a class-150 carbon steel flange can resist when exposed to 600 degrees Fahrenheit. A class-300 flange with identical other specifications can sustain 570 psi. With the exact substance and bore size, a class-2500 flange can sustain up to 4730 psi, which is 34 times more pressure compared to a 150-class flange.

ANSI flanges are utilized for all applications other than oil drilling and well heading. For flanges up to 24 inches in diameter, ANSI B16.5 is utilized, and for flanges larger than 24 inches, ANSI B16.47 is employed.

Pressure Rating Designation Of Flanges

The results of the ANSI pressure rating chart are displayed in Class, Lb, or Pound. The designation of the pressure-temperature rating of flanges is class, which is followed by an arbitrary number. There are seven different sorts of flange rating designations, each denoted by a “#”:

150#
300#
400#
600#
900#
1500#
2500#

The pound system is represented by the symbol “#,” which is also symbolized by “Lb.” Numerous designations, including 150 Lb, 150 Lbs, 150#, and Class 150, are used to identify flanges and these all signify the same thing. However, there is just one signal that is accurate, which is “Pressure class.”

All of these signs just represent the idea of a flange’s pressure or temperature capability for valves and are interchangeable. This pressure or temperature performance is crucial since it aids in the selection of the best flange for the circumstances.

A Brief Guide To ANSI Flange Pressure Rating Chart

Check out the details of the ANSI flange pressure ratings chart about class 1 flanges.

Class 150

If the temperature for Class 1 150# flange is < 100 degrees Fahrenheit, the maximum pressure for flanges is 285 psi.
If the temperature for Class 1 150# flange is 200 degrees Fahrenheit, the maximum pressure for flanges is 260 psi.
If the temperature for Class 1 150# flange is 300 degrees Fahrenheit, the maximum pressure for flanges is 230 psi.
If the temperature for Class 1 150# flange is 400 degrees Fahrenheit, the maximum pressure for flanges is 200 psi.
If the temperature for Class 1 150# flange is 500 degrees Fahrenheit, the maximum pressure for flanges is 170 psi.
If the temperature for Class 1 150# flange is 600 degrees Fahrenheit, the maximum pressure for flanges is 140 psi.
If the temperature for Class 1 150# flange is 700 degrees Fahrenheit, the maximum pressure for flanges is 110 psi.
If the temperature for Class 1 150# flange is 800 degrees Fahrenheit, the maximum pressure for flanges is 80 psi.
If the temperature for Class 1 150# flange is 900 degrees Fahrenheit, the maximum pressure for flanges is 50 psi.
If the temperature for Class 1 150# flange is 1000 degrees Fahrenheit, the maximum pressure for flanges is 20 psi.

Class 300

If the temperature for Class 1 300# flange is < 100 degrees Fahrenheit, the maximum pressure for flanges is 740 psi.
If the temperature for Class 1 300# flange is 200 degrees Fahrenheit, the maximum pressure for flanges is 680 psi.
If the temperature for Class 1 300# flange is 300 degrees Fahrenheit, the maximum pressure for flanges is 655 psi.
If the temperature for Class 1 300# flange is 400 degrees Fahrenheit, the maximum pressure for flanges is 635 psi.
If the temperature for Class 1 300# flange is 500 degrees Fahrenheit, the maximum pressure for flanges is 605 psi.
If the temperature for Class 1 300# flange is 600 degrees Fahrenheit, the maximum pressure for flanges is 570 psi.
If the temperature for Class 1 300# flange is 700 degrees Fahrenheit, the maximum pressure for flanges is 530 psi.
If the temperature for Class 1 300# flange is 800 degrees Fahrenheit, the maximum pressure for flanges is 410 psi.
If the temperature for Class 1 300# flange is 900 degrees Fahrenheit, the maximum pressure for flanges is 230 psi.
If the temperature for Class 1 300# flange is 1000 degrees Fahrenheit, the maximum pressure for flanges is 85 psi.

Class 400

If the temperature for Class 1 400# flange is < 100 degrees Fahrenheit, the maximum pressure for flanges is 985 psi.
If the temperature for Class 1 400# flange is 200 degrees Fahrenheit, the maximum pressure for flanges is 905 psi.
If the temperature for Class 1 400# flange is 300 degrees Fahrenheit, the maximum pressure for flanges is 870 psi.
If the temperature for Class 1 400# flange is 400 degrees Fahrenheit, the maximum pressure for flanges is 845 psi.
If the temperature for Class 1 400# flange is 500 degrees Fahrenheit, the maximum pressure for flanges is 805 psi.
If the temperature for Class 1 400# flange is 600 degrees Fahrenheit, the maximum pressure for flanges is 755 psi.
If the temperature for Class 1 400# flange is 700 degrees Fahrenheit, the maximum pressure for flanges is 710 psi.
If the temperature for Class 1 400# flange is 800 degrees Fahrenheit, the maximum pressure for flanges is 550 psi.
If the temperature for Class 1 400# flange is 900 degrees Fahrenheit, the maximum pressure for flanges is 305 psi.
If the temperature for Class 1 400# flange is 1000 degrees Fahrenheit, the maximum pressure for flanges is 115 psi.

Class 600

If the temperature for Class 1 600# flange is < 100 degrees Fahrenheit, the maximum pressure for flanges is 1480 psi.
If the temperature for Class 1 600# flange is 200 degrees Fahrenheit, the maximum pressure for flanges is 1360 psi.
If the temperature for Class 1 600# flange is 300 degrees Fahrenheit, the maximum pressure for flanges is 1310 psi.
If the temperature for Class 1 600# flange is 400 degrees Fahrenheit, the maximum pressure for flanges is 1265 psi.
If the temperature for Class 1 600# flange is 500 degrees Fahrenheit, the maximum pressure for flanges is 1205 psi.
If the temperature for Class 1 600# flange is 600 degrees Fahrenheit, the maximum pressure for flanges is 1135 psi.
If the temperature for Class 1 600# flange is 700 degrees Fahrenheit, the maximum pressure for flanges is 1060 psi.
If the temperature for Class 1 600# flange is 800 degrees Fahrenheit, the maximum pressure for flanges is 825 psi.
If the temperature for Class 1 600# flange is 900 degrees Fahrenheit, the maximum pressure for flanges is 460 psi.
If the temperature for Class 1 600# flange is 1000 degrees Fahrenheit, the maximum pressure for flanges is 170 psi.

Class 900

If the temperature for Class 1 900# flange is < 100 degrees Fahrenheit, the maximum pressure for flanges is 2220 psi.
If the temperature for Class 1 900# flange is 200 degrees Fahrenheit, the maximum pressure for flanges is 2035 psi.
If the temperature for Class 1 900# flange is 300 degrees Fahrenheit, the maximum pressure for flanges is 1965 psi.
If the temperature for Class 1 900# flange is 400 degrees Fahrenheit, the maximum pressure for flanges is 1900 psi.
If the temperature for Class 1 900# flange is 500 degrees Fahrenheit, the maximum pressure for flanges is 1810 psi.
If the temperature for Class 1 900# flange is 600 degrees Fahrenheit, the maximum pressure for flanges is 1705 psi.
If the temperature for Class 1 900# flange is 700 degrees Fahrenheit, the maximum pressure for flanges is 1590 psi.
If the temperature for Class 1 900# flange is 800 degrees Fahrenheit, the maximum pressure for flanges is 1235 psi.
If the temperature for Class 1 900# flange is 900 degrees Fahrenheit, the maximum pressure for flanges is 690 psi.
If the temperature for Class 1 900# flange is 1000 degrees Fahrenheit, the maximum pressure for flanges is 255 psi.

Class 1500

If the temperature for Class 1 1500# flange is < 100 degrees Fahrenheit, the maximum pressure for flanges is 3705 psi.
If the temperature for Class 1 1500# flange is 200 degrees Fahrenheit, the maximum pressure for flanges is 3395 psi.
If the temperature for Class 1 1500# flange is 300 degrees Fahrenheit, the maximum pressure for flanges is 3270 psi.
If the temperature for Class 1 1500# flange is 400 degrees Fahrenheit, the maximum pressure for flanges is 3170 psi.
If the temperature for Class 1 1500# flange is 500 degrees Fahrenheit, the maximum pressure for flanges is 3015 psi.
If the temperature for Class 1 1500# flange is 600 degrees Fahrenheit, the maximum pressure for flanges is 2840 psi.
If the temperature for Class 1 1500# flange is 700 degrees Fahrenheit, the maximum pressure for flanges is 2655 psi.
If the temperature for Class 1 1500# flange is 800 degrees Fahrenheit, the maximum pressure for flanges is 2055 psi.
If the temperature for Class 1 1500# flange is 900 degrees Fahrenheit, the maximum pressure for flanges is 1150 psi.
If the temperature for Class 1 1500# flange is 1000 degrees Fahrenheit, the maximum pressure for flanges is 430 psi.

Class 2500

If the temperature for Class 1 2500# flange is < 100 degrees Fahrenheit, the maximum pressure for flanges is 6170 psi.
If the temperature for Class 1 2500# flange is 200 degrees Fahrenheit, the maximum pressure for flanges is 5655 psi.
If the temperature for Class 1 2500# flange is 300 degrees Fahrenheit, the maximum pressure for flanges is 5450 psi.
If the temperature for Class 1 2500# flange is 400 degrees Fahrenheit, the maximum pressure for flanges is 5280 psi.
If the temperature for Class 1 2500# flange is 500 degrees Fahrenheit, the maximum pressure for flanges is 5025 psi.
If the temperature for Class 1 2500# flange is 600 degrees Fahrenheit, the maximum pressure for flanges is 4730 psi.
If the temperature for Class 1 2500# flange is 700 degrees Fahrenheit, the maximum pressure for flanges is 4425 psi.
If the temperature for Class 1 2500# flange is 800 degrees Fahrenheit, the maximum pressure for flanges is 3430 psi.
If the temperature for Class 1 2500# flange is 900 degrees Fahrenheit, the maximum pressure for flanges is 1915 psi.
If the temperature for Class 1 2500# flange is 1000 degrees Fahrenheit, the maximum pressure for flanges is 715 psi.

What Is The Effect Of Flange Pressure Rating On Flange Size

A method of grouping different pressure-temperature established ratings of flanges as per the flange material is known as flange pressure rating. There are a few aesthetic characteristics that distinguish a lower-class flange from a higher-class flange:

A flange with a comparatively higher grade is thicker and has greater pressure and temperature resistance.
The flange’s outside diameter will grow as the flange pressure rating does.
In accordance with the flange pressure rating, the bolt circle diameter will rise.
With higher flange classes comes larger bolt holes and more bolts to install.
Higher flange ratings also result in wider flange faces.
Conclusion

At some particular temperature requirements, a flange with an elevated rating or class is more powerful than a flange with less rating or class. If they are constructed of the same material and have a higher grade, flanges can tolerate more pressure and heat. At the exact rating and flange class, a flange manufactured of a distinct material will have a varied holding capability for pressure and temperature.
Flanged valves play an important role in every industrial application, hope this article could help you find the best valve for your application. If you need high quality flanged valves, feel free to catact us sales@stvvalves.com

May 8, 2023/by stvvalve

Company News

What is a wafer butterfly valve?

This is a butterfly valve that is sandwiched between two pipe ends. The pipe ends are in terms of flanges with holes. Long bolts are used to surround the valve body to hold it firmly in its position. The bolts cross the whole valve body. Wafer butterfly valve manufacturers design this valve with or without flange holes on the valve body. Tightly fitted seals such as gasket and O-rings are used between the valves and pipe to enhance leakage-proof connection. Wafer butterfly valve manufacturers produce these valves to operate manually or automatically. The automatic types use actuators to start or stop while the manual types use a handwheel or hand lever. These valves occupy a small space since they are short in length. This property makes the valve light in weight and less expensive. Depending on the material used to make the valve and more so internal components, this valve can be used for low to high temperatures as well as corrosive media.

Figure: Wafer butterfly valve.

Components of a wafer butterfly valve

Body

The body is the component of a wafer butterfly valve that is used to cover internal parts. The body is usually made of strong metallic materials like brass, nickel alloy, stainless steel, and carbon steel among other strong materials. However, other valves are made of plastic bodies and are meant for use in low-temperature and low-pressure applications.

Handwheel/ actuator

Handwheel is the component where the operator applies force to start and stop the valve by making a quarter turn angle. Handwheel is used in manual wafer butterfly valves while the actuator is used in automatic valves. The actuator is designed provide torque to start and stop the valve.

Stem

The stem is the component connecting the handwheel/ hand lever or actuator to the valve disc. The use of the stem is to transmit torque applied on the handwheel or actuator to the disc.

Disc

This is the main component of a wafer butterfly valve as it is used to start and stop fluid flow. It gets the power to open and close from the handle/actuator through the stem.

Seat

A seat is a component used to prevent fluid leakage when the valve is closed. It forms the component on which the disc rests when the valve closes.

Gasket

This component is placed between the valve and pipe mating surfaces to prevent fluid leakage.

Components of a wafer butterfly valve

Figure: Components of a wafer butterfly valve.

How does a wafer butterfly valve work?

A wafer butterfly valve is classified as a quarter-turn valve. This means that the valve turns the disc for 90^o degrees to open or close. Both the actuated and the manual valves have the same working principle. To start the fluid flow, the handwheel is rotated in the counterclockwise direction for a 90^o degree angle. This rotation of the handle causes the stem and thus the disc to make the same rotation. As such, the disc becomes oriented collinear to the fluid flow. This leaves the valve open for the fluid to keep flowing. To close the valve, the handwheel is rotated again but in the clockwise direction. This rotation forces the disc to turn and become perpendicular to the pipe where it completely blocks flow through the valve. Wafer butterfly valve manufacturers have designed these valves for both shut-off and throttling use. To use these valves for throttling, the handle and thus the disc is rotated for an angle of less than a quarter turn to allow some level of fluid flow through the valve.

Working of a wafer butterfly valve

Figure: Working of a wafer butterfly valve.

Types of wafer butterfly valves

Manual wafer butterfly valves

This is a wafer butterfly valve that is operated manually. The manual control mechanism is the handwheel or hand lever and the valve operator applies force to open/close the valve. Compared to the automatic wafer butterfly valve, this valve is cheaper. This valve is suitable for use where electricity or another source of power is not available or would be expensive. Manual butterfly valve manufacturer design some of these valves with a gear system. This design is meant to help change the torque along the horizontal axis to the vertical axis. The torque along the horizontal axis comes from the handwheel and it has to change direction to move vertically downwards to the disc hence the use of the gear system in the gearbox. The gearbox is placed on top of the valve stem. Despite manual wafer butterfly valves being cheaper and convenient to use, they are risky to the operator in case of leakage and hazardous fluids. Also, it may be so tiresome for the operator if a lot of torque is needed where the valve has to start and stop frequently.

Stainless steel wafer butterfly valve

Figure: Manual wafer butterfly valve.

Electric actuated wafer butterfly valve

This is a wafer butterfly valve that is operated using an electric actuator. Wafer butterfly valve manufacturers design the actuator with an automated system to help in determining when the disc closes and opens fluid flow. These valves operate using mechanical energy. As such, the valve is designed with an electric motor that converts electrical energy to mechanical energy in terms of torque. The actuator is connected to the valve stem so that it can get the torque needed by the valve. Electric actuated wafer butterfly valves can be installed in all industries because electricity is readily available. However, an electric actuated butterfly valve is expensive compared to the manual one. Repair of the valve is also expensive because of the electrical components like a motor which is expensive to replace. However, the advantages of this valve greatly outweigh the disadvantages since the valve relieves the user of fatigue unlike manual types.

Electric actuated wafer butterfly valve

Figure: Electric actuated wafer butterfly valve.

Pneumatic wafer butterfly valve

This is a wafer butterfly valve that operates using a pneumatic actuator. A pneumatic actuator is one that converts energy of compressed air into mechanical energy needed to run the valve. A pneumatic actuator has other names such as air cylinders, pneumatic cylinders, and air actuators. Wafer butterfly valve manufacturers design this valve to rely on compressed air which enters a chamber to build up pressure. Once the pressure exceeds a certain pressure level exceeding the atmospheric pressure outside the chamber, it creates controlled mechanical energy in terms of torque. This pneumatic butterfly valve is versatile as it can be used in different industrial applications involving corrosive and food products. The compressed air can be cleaned before being used to run the valve and thus enhance high levels of hygiene.

Pneumatic wafer butterfly valve

Figure: Pneumatic wafer butterfly valve.

Hydraulic wafer butterfly valve

This is a wafer butterfly valve that operates using a hydraulic actuator. The hydraulic actuator operates by using hydraulic liquid. This actuator helps to change hydraulic liquid’s pressure energy into kinetic energy in terms of torque needed to start and stop the valve. This valve is suitable for use where high torque is required since it is more efficient in producing torque because of the incompressible properties of the hydraulic liquid. However, wafer butterfly valve manufacturers recommend use of this valve where there is low temperature since the hydraulic fluid can be affected if the temperature is high. Also, in case the hydraulic fluid leaks, it causes a lot of contamination which is undesirable in industries like foods and beverages and pharmaceuticals processing.

Hydraulic wafer butterfly valve

Figure: Hydraulic wafer butterfly valve.

Plastic wafer butterfly valve

This is a wafer butterfly valve that is made of plastic material. There are various plastic materials used by wafer butterfly valve manufacturers to make this valve among them polyvinyl chloride and propylene. This valve is made for use in very corrosive media and which is at low temperatures. Plastic wafer butterfly valve manufacturers recommend this valve in such applications because they are much more resistant to corrosion compared to metallic types like stainless steel. Plastic materials are also cheaper compared the metallic ones. As such, this valve ends up being cheaper compared to the metallic wafer butterfly valves. The design employed to make this valve renders it strong to make it withstand fluid pressure as well as the impact of falling objects.

Plastic wafer butterfly valve

Figure: Plastic wafer butterfly valve.

Applications of wafer butterfly valves

Wafer butterfly valves are used in fire protection systems.
They are used in the manufacturing of chemicals.
They are used in municipal wastewater treatment and water purification.
Wafer butterfly valves are used in heating ventilation and air-conditioning (HVAC) systems.
They are used in the processing of foods and beverages.
These valves are used in petroleum refineries.
Wafer butterfly valves are used in mining applications.
They are used in the pharmaceutical industries as they can easily maintain high levels of hygiene.

Advantages of wafer butterfly valves

These valves can be automatic or manual.
Wafer butterfly valves are cheaper compared to other butterfly valves.
The use of quarter turn to open and close fluid flow makes these valves fast operating.
Wafer butterfly valves are made of simple and compact design.
They are of small size and thus light in weight.
Their small sizes leads to small installation space in the piping system.
Wafer butterfly valves are easy to clean, install and repair.
Their design makes them versatile and hence applicable in various industries.
These valves can allow bi-directional or uni-directional fluid flow.
They are resistant to corrosion and abrasion wear.
Wafer butterfly valves can be used in slurries and sludge applications.

Disadvantages of wafer butterfly valves

Wafer butterfly valve seals are weak compared to other valves which may cause leakage in case of high pressure.
They contribute to pressure drop because the disc remains in the fluid flow path when the valve is open.
Their design makes them prone to choking and cavitation.
The closing and opening of the valve disc is influenced by fluid turbulence.

Troubleshooting wafer butterfly valves

The wafer butterfly valve does not close completely

Foreign materials in the valve. Open the valve and remove the materials. Clean the internal parts of the valve.

Valve is hard to operate

Presence of foreign materials in the valve. Open the valve and remove any foreign materials.
Corrosion in the valve. Open the valve and clean off the corrosion. Ensure the valve is used on the correct type of fluid as recommended by the wafer butterfly valve manufacturer.

External fluid leakage

Worn out packing. Replace the packing.
Worn out O-rings. Replace the O-rings.
High fluid pressure. Reduce the fluid pressure to the range indicated by the wafer butterfly valve manufacturer.
Loose bolts. Tighten the bolts.
Worn out gaskets between the valve and the pipe. Replace the gaskets.

Internal fluid leakage

Worn out seats. Replace the seat.
O-rings worn out. Replace the O-rings.
Clogged dirt in the valve. Clean the dirt.

Summary

A wafer butterfly valve is a valve that is installed in a piping system by clamping it between two flanges of the pipe. The pipe flanges are connected using bolts. These bolts cross the valve body to the pipe flanges. Wafer butterfly valve manufacturers design this valve with short lengths which makes it possible for the bolts over the valve. This valve is classified as a quarter-turn valve. This means that the valve operates by turning the disc for a quarter turn angle to start or stop fluid flow. The available designs of these valves operate using handwheel/hand lever or actuator. These valves are applicable in different industries. However, for the best service and economical application, the valve has to be used according to the instruction given by the wafer butterfly valve manufacturer.

Wafer butterfly valves are of various types which include manual wafer butterfly valves, plastic wafer butterfly valves, hydraulic wafer butterfly valves, pneumatic wafer butterfly valves, and electric actuated wafer butterfly valves among others. Applications of wafer butterfly valves include HVAC, wastewater treatment, mining operations, food processing, and chemical manufacturing among others. Advantages of using wafer butterfly valves include lightweight, small size, easy installation, cleaning and repair, fast operation, simple and compact design, and versatility.

September 12, 2022/by stvvalve

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