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Understanding Double Offset Butterfly Valves in 2025

Understanding Double Offset Butterfly Valves in 2025: The Future of High-Performance Flow Control

In industrial fluid control systems, butterfly valves are essential for regulating flow efficiently. Among them, Double Offset Butterfly Valves (DOBVs) stand out for their durability, tight sealing, and high-pressure capabilities. As industries evolve in 2025, the demand for reliable, long-lasting valves is higher than ever.

In this blog, we’ll explore:
✔ What is a Double Offset Butterfly Valve?
✔ How It Works & Key Benefits
✔ Applications in Modern Industries
✔ Why Choose STV (China) as Your Trusted Supplier?

1. What is a Double Offset Butterfly Valve?

A Double Offset Butterfly Valve (DOBV) is an advanced version of the standard butterfly valve, featuring two key offsets in its disc positioning:

  1. First Offset: The stem is positioned behind the disc centerline (elevated from the pipe center).

  2. Second Offset: The stem is also offset from the seat centerline (eccentric).

This unique design reduces friction, minimizes wear, and ensures a bubble-tight seal—making it ideal for high-pressure and high-temperature applications.

Key Features

✅ Metal or resilient seating (stainless steel, PTFE)
✅ Bubble-tight shutoff (meets ANSI/FCI 70-2 Class VI)
✅ Lower operating torque (easier automation)
✅ Longer lifespan (reduced seat wear)

2. How Does a Double Offset Butterfly Valve Work?

Unlike standard butterfly valves, DOBVs operate with a cam-like motion:

  • Opening/Closing: The disc lifts slightly before rotating, preventing seat friction.

  • Tight Sealing: When closed, the disc wedges firmly against the seat, ensuring zero leakage.

  • Throttling Capability: Provides better flow control than concentric valves.

This makes DOBVs perfect for isolation, regulation, and shutoff in demanding environments.

3. Top Applications in 2025

Double Offset Butterfly Valves are widely used in:
✔ Oil & Gas – Pipeline isolation, refining, LNG processing.
✔ Power Generation – Steam control, cooling systems.
✔ Chemical & Petrochemical – Corrosive fluid handling.
✔ Water & Wastewater – High-pressure treatment plants.
✔ HVAC & Industrial Processes – Energy-efficient flow control.

With stricter environmental regulations in 2025, industries need leak-proof, high-performance valves—and DOBVs deliver exactly that.

4. Why Choose STV (China) for Double Offset Butterfly Valves?

When sourcing high-quality butterfly valves, STV (China) stands out as a leading global supplier with:

✔ Superior Manufacturing Standards

  • ISO 9001 & API 609 certified.

  • Advanced CNC machining for precision engineering.

✔ Custom Solutions for Every Industry

  • Available in stainless steel, carbon steel, duplex steel.

  • Custom sizes (2″ to 80″), pressure ratings (up to Class 600).

✔ Competitive Pricing & Fast Delivery

  • Cost-effective without compromising quality.

  • Global logistics support for timely shipments.

✔ After-Sales Support & Warranty

  • 24/7 technical assistance.

  • Extended warranty for peace of mind.

STV’s Double Offset Butterfly Valves are trusted by oil refineries, power plants, and water treatment facilities worldwide—making them a smart investment for 2025 and beyond.

5. Double Offset vs. Triple Offset: Which One to Choose?

Feature Double Offset Triple Offset
Seat Material Metal/PTFE Metal (Graphite)
Sealing Bubble-tight Zero leakage, fire-safe
Pressure Up to Class 600 Up to Class 2500
Best For General high-pressure Extreme conditions (refineries)

For most industrial applications, Double Offset Butterfly Valves offer the perfect balance of performance and cost-efficiency.

Conclusion: The Future of Flow Control is Here

As industries advance in 2025, Double Offset Butterfly Valves remain a top choice for reliable, high-performance flow control. With STV (China) as your supplier, you get durable, precision-engineered valves at competitive prices—ensuring smooth operations and long-term savings.

Need a trusted valve supplier? Contact STV (China) today for a quote!

📞 +8615157766245 | 🌐 www.stvvalves.com | ✉ sales@stvvalves.com

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What Is a 3-Way Ball Valve

A 3-way ball valve is a type of ball valve with three ports (inlet/outlet connections) instead of the standard two found in a 2-way valve. It is designed to control, divert, or mix the flow of liquids or gases in industrial, commercial, and residential systems.

How a 3-Way Ball Valve Works

The valve has a hollow, rotating ball inside with one or more bore passages (holes). Depending on the handle position, the flow can be:

  • Diverted from one inlet to two outlets (or vice versa).

  • Mixed from two inlets into one outlet.

  • Shut off completely (in some designs).

Types of 3-Way Ball Valves

  1. L-Port (90° Diversion)

    • Flow switches between two paths at a 90-degree angle.

    • Example: Inlet → Outlet A or Outlet B (but not both at once).

    • Used for flow redirection.

  2. T-Port (Mixing/Splitting)

    • Flow can be combined (mixed) or split between all three ports.

    • Example: Two inlets → One outlet, or One inlet → Two outlets.

    • Used in blending applications.

  3. Full-Port vs. Reduced-Port

    • Full-port: Larger bore for minimal flow restriction.

    • Reduced-port: Smaller bore, may cause pressure drop.

Common Applications

  • HVAC Systems – Diverting hot/cold water.

  • Chemical Processing – Mixing different fluids.

  • Water Treatment – Switching between filtration paths.

  • Industrial Automation – Controlling multiple flow lines.

Advantages Over 2-Way Valves

  • Flexibility: Can switch, mix, or isolate flow.

  • Space-saving: Replaces multiple 2-way valves in complex systems.

  • Efficiency: Reduces need for extra piping and fittings.

    3 Way Ball Valve: What’s Its Difference From 2 Way Ball Valve

  • A 3-way ball valve and a 2-way ball valve serve different purposes in fluid control systems, primarily due to their port configurations and flow direction options. Here’s a breakdown of their key differences:

    1. Number of Ports & Flow Paths

    • 2-Way Ball Valve:

      • Has 2 ports (inlet and outlet).

      • Allows flow in one direction (straight through or L/T-port for diversion).

      • Basic on/off or shutoff function.

    • 3-Way Ball Valve:

      • Has 3 ports (typically one inlet and two outlets, or two inlets and one outlet).

      • Can divert, mix, or shut off flow between multiple paths.

      • Common configurations: L-port (90° diversion) and T-port (mixing or splitting).

    2. Functionality

    • 2-Way Valve:

      • Simple open/close operation.

      • Used for isolating flow in a single pipeline.

    • 3-Way Valve:

      • Can perform:

        • Flow Diversion (send fluid to one of two paths).

        • Flow Mixing (combine two inputs into one output).

        • Shutoff (block all flow if needed).

      • Used in more complex systems requiring redirection of fluids.

    3. Common Applications

    • 2-Way Ball Valve:

      • Water supply lines, gas lines, general shutoff applications.

    • 3-Way Ball Valve:

      • HVAC systems (diverting hot/cold water).

      • Chemical processing (mixing fluids).

      • Industrial systems requiring flow switching.

    4. Visual Differences

    • 2-Way: Single straight handle (indicating open/close).

    • 3-Way: Handle may rotate to switch between ports (L or T pattern).

    Which One to Choose?

    • Use a 2-way valve if you only need to start/stop flow in a single line.

    • Use a 3-way valve if you need to switch, mix, or distribute flow between multiple lines.

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DIFFERENCES BETWEEN DOUBLE VS. TRIPLE ECCENTRIC BUTTERFLY VALVE

Double Eccentric (Double Offset) and Triple Eccentric (Triple Offset) Butterfly Valves are advanced designs of butterfly valves used in critical applications. Here are the key differences between them:

1. Eccentricity (Offset Design)

  • Double Eccentric (2-offset):

    • 1st Offset: The shaft is positioned behind the seat (offset from the centerline of the disc).

    • 2nd Offset: The shaft is offset from the pipe centerline (radial offset).

    • Reduces friction during operation but still has some contact between disc and seat.

  • Triple Eccentric (3-offset):

    • 1st & 2nd Offsets: Same as double eccentric.

    • 3rd Offset: The seating surface is conical/angled (eccentric taper), ensuring zero friction during operation.

    • Eliminates rubbing between disc and seat, enhancing durability.

2. Sealing Mechanism

  • Double Eccentric:

    • Uses a soft seat (PTFE, elastomeric) or metal-to-metal seal.

    • Requires some contact between disc and seat for sealing.

    • Suitable for moderate temperatures and pressures.

  • Triple Eccentric:

    • Uses metal-to-metal sealing (often with a layered or laminated seat).

    • Bubble-tight shut-off even in high-pressure/temperature applications.

    • Ideal for extreme conditions (cryogenic, high-pressure steam, corrosive fluids).

3. Applications

  • Double Eccentric:

    • Water treatment, HVAC, general industrial processes.

    • Moderate pressure/temperature conditions.

  • Triple Eccentric:

    • Oil & gas, petrochemical, power plants, LNG, high-pressure steam.

    • Critical services requiring zero leakage and high durability.

4. Pressure & Temperature Ratings

  • Double Eccentric:

    • Typically up to Class 600 (PN 100).

    • Max temperature limited by seat material (usually up to 200°C with soft seats).

  • Triple Eccentric:

    • Can handle Class 1500+ (PN 250+).

    • Operates up to 1000°C (with metal seats).

5. Maintenance & Lifespan

  • Double Eccentric:

    • Requires occasional maintenance due to seat wear.

  • Triple Eccentric:

    • Longer lifespan due to no friction wear.

    • Minimal maintenance needed.

6. Cost

  • Double Eccentric:

    • More economical, suitable for less demanding applications.

  • Triple Eccentric:

    • Higher initial cost but cost-effective in critical services.

Summary Table

Feature Double Eccentric Butterfly Valve Triple Eccentric Butterfly Valve
Eccentricity 2 offsets (shaft & radial) 3 offsets (shaft, radial, conical taper)
Sealing Type Soft or metal-assisted seal Metal-to-metal (bubble-tight)
Friction Some contact during operation Zero friction (no rubbing)
Max Pressure Up to Class 600 Up to Class 2500+
Max Temperature ~200°C (soft seat) Up to 1000°C (metal seat)
Applications Water, HVAC, general industry Oil & gas, power plants, steam
Cost Lower Higher (justified for critical use)

Conclusion

  • Choose Double Eccentric for cost-effective, moderate-duty applications.

  • Choose Triple Eccentric for high-pressure, high-temperature, or zero-leakage requirements.

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Guide to Selecting the Right Butterfly Valve

Selecting the correct butterfly valve requires understanding your application’s pressure, temperature, flow control needs, and fluid type. Below is a step-by-step guide to ensure optimal performance and longevity.

china : API 609 Lug Type Butterfly Valve

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1. Determine Valve Type Based on Design

Type Best For Pressure Range Seal Type
Wafer Low-pressure water/air ≤ 150 PSI Rubber/PTFE
Lug Dead-end service, easy removal ≤ 150 PSI Rubber/PTFE
Flanged High-pressure systems Up to 1,450 PSI Rubber/PTFE/Metal
Double Offset HVAC, moderate throttling Up to 250 PSI PTFE/Metal
Triple Offset Zero leakage, high-P/temp Up to 1,450 PSI Metal

Recommendation:

  • Water treatment? → Wafer or Lug (EPDM seat).

  • Oil & gas? → Triple-offset (metal seat, fire-safe).

2. Material Selection (Body & Disc)

Material Fluid Compatibility Max Temp Applications
Cast Iron Water, air 250°C HVAC, general purpose
Ductile Iron Water, mild chemicals 350°C Water distribution
Stainless Steel (CF8M/316SS) Corrosive fluids 600°C Chemical, marine
Duplex Stainless Seawater, chlorides 300°C Offshore, desalination
Nickel-Aluminum Bronze Seawater, steam 400°C Marine, shipbuilding

Key Tip:

  • For corrosive fluids (acids, chlorine), use PTFE-lined SS valves.

3. Seat Material (Sealing Performance)

Seat Type Leakage Class Max Temp Best For
EPDM Rubber Class VI (bubble-tight) 120°C Water, air
Nitrile (NBR) Class VI 80°C Oils, fuels
PTFE Class VI 200°C Chemicals, steam
Metal (Stellite/316SS) Class IV (low leakage) 600°C High-P/temp

Critical Choice:

  • Zero leakage? → PTFE or EPDM.

  • Fire-safe? → Metal seat (API 607 certified).

4. Actuation Method

Actuator Type Operation Best For
Lever/HANDWHEEL Manual, quarter-turn Small valves, low torque
Gear Operator Manual, high torque Large valves (≥12″)
Pneumatic Automated, fast response Frequent cycling
Electric Precise control Remote operation
Hydraulic High-force applications Offshore, heavy industry

Rule of Thumb:

  • Valves > 12″ usually need gear or actuators.

5. Pressure & Temperature Limits

  • Check ASME B16.34 ratings for your valve’s pressure class (e.g., 150, 300, 600 PSI).

  • Example:

    • EPDM seat → Max 150 PSI @ 120°C.

    • Metal seat → Up to 1,450 PSI @ 600°C.

Always derate for high temperatures!

6. Certifications & Standards

Standard Purpose
API 609 Design/testing for triple-offset valves
ISO 5752 Face-to-face dimensions
API 607 Fire-safe testing
AWWA C504 Waterworks applications

Critical for:

  • Oil & gas → API 609, NACE MR0175 (sour service).

  • Potable water → NSF/ANSI 61 certified.

7. Top Butterfly Valve Manufacturers

Brand Specialization
Emerson (Keystone) General-purpose, HVAC
Flowserve (Argus) Triple-offset, high-P
Crane (Xomox) Chemical, lined valves
DeZURIK Water/wastewater
Bray Fire-safe, oil & gas

8. Selection Checklist

✅ Valve type (wafer, lug, triple-offset)
✅ Body/disc material (cast iron, SS, duplex)
✅ Seat material (EPDM, PTFE, metal)
✅ Actuation (manual, pneumatic, electric)
✅ Pressure/temperature rating (ASME B16.34)
✅ Certifications (API 609, NSF, NACE)

Final Recommendation

  • Water treatment? → Wafer-style, EPDM seat, ductile iron body.

  • Oil & gas? → Triple-offset, metal seat, API 609 compliant.

  • Chemical processing? → PTFE-lined SS, pneumatic actuation.

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How Does a Butterfly Valve Work?

How Does a Butterfly Valve Work?

China A217 WC6 Butterfly Valve

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A butterfly valve is a quarter-turn rotary valve used to start, stop, or regulate fluid flow in pipelines. It consists of a rotating disc mounted on a central shaft, which controls flow by turning perpendicular (closed) or parallel (open) to the flow direction.

1. Key Components

Part Function
Body Houses the disc and connects to the pipeline (wafer, lug, or flanged).
Disc Rotates 90° to open/close flow (also called the “butterfly”).
Stem Transmits torque from the actuator to the disc.
Seat Provides a tight seal (rubber, PTFE, or metal).
Actuator Manual (lever, gear) or automated (pneumatic, electric, hydraulic).

2. Working Principle

A. Open Position (0°)

  • The disc is parallel to the flow, allowing full fluid passage.

  • Minimal pressure drop (ideal for low-resistance systems).

B. Partially Open (0°–90°)

  • The disc is angled, regulating flow rate (used for throttling).

  • Higher turbulence than gate/ball valves (not ideal for precise control).

C. Closed Position (90°)

  • The disc is perpendicular to the flow, blocking it completely.

  • The seat compresses against the disc for a bubble-tight seal (if elastomeric).

3. Types of Butterfly Valves

Type Design Best For
Wafer Lightweight, clamped between flanges Low-pressure water/air
Lug Threaded inserts for bolt-on installation Dead-end service, easy maintenance
Flanged Integral flanges for direct piping connection High-pressure systems
Double Offset Eccentric stem reduces seat wear HVAC, moderate pressures
Triple Offset Metal seat, zero leakage Oil & gas, high-P/temp

4. Advantages & Disadvantages

✔ Advantages

  • Compact & lightweight vs. gate/ball valves.

  • Fast operation (90° turn).

  • Lower cost for large diameters.

  • Good flow regulation (if designed for throttling).

✖ Disadvantages

  • Higher pressure drop than gate/globe valves.

  • Not ideal for slurries (disc can erode).

  • Limited high-P/temp (unless triple-offset design).

5. Common Applications

  • Water Treatment: Pump control, filtration.

  • HVAC: Chilled water, air handling.

  • Oil & Gas: Tank vents, low-P pipelines.

  • Chemical Processing: Corrosive fluids (with lined seats).

  • Marine/Shipbuilding: Seawater ballast systems.

6. Butterfly Valve vs. Other Valves

Valve Type Best For Butterfly Valve Comparison
Gate Valve On/off, high-pressure Heavier, slower, no throttling
Ball Valve Tight shutoff, high-P More expensive, better sealing
Globe Valve Precise throttling Higher pressure drop

Conclusion

A butterfly valve is a versatile, cost-effective choice for quick shutoff or moderate throttling in large pipes. For high-pressure/temperature or zero-leakage needs, consider triple-offset metal-seated designs.

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Understanding the 3 Inch Gate Valve ASTM A105N 1500 LB for Industrial Applications

1. Valve Overview

  • Material: ASTM A105N (Normalized forged carbon steel)

    • Normalization improves toughness and stress resistance vs. standard A105.

    • Suitable for -29°C to 425°C; for cryogenic use, opt for A350 LF2.

  • Size: 3″ (DN 80) – balances flow capacity and compactness.

  • Pressure Class: 1500 LB (per ASME B16.34)

    • 1500 PSI @ 38°C; derate at higher temps (e.g., ~1000 PSI @ 400°C).

    • Understanding the 3 Inch Gate Valve ASTM A105N 800 LB for Industrial Applications

      3 Inch Gate Valve, 800LB Forged Gate Valve Supplier in china, API 602 Gate Valve, Bolt Bonnet Gate Valve Manufacturer, China ASTM A105 Gate Valve, Class 800 LB Gate Valve

2. Key Design Standards

Standard Purpose
API 602 Design/manufacturing of forged steel gate valves (≤ 4″).
ASME B16.34 Pressure-temperature ratings for valve bodies.
API 598 Defines pressure and leakage testing (Class B for metal seats).
NACE MR0175 Required for sour service (H₂S environments).

3. Industrial Applications

  • Oil & Gas: Wellheads, pipelines, manifolds (high-pressure isolation).

  • Power Plants: Steam lines, boiler feed systems.

  • Petrochemical: Refinery process lines, hydrogen service.

  • Hydrocarbon Processing: Fire-safe designs (API 607/6FA) for flammable fluids.

4. Critical Selection Factors

A. End Connections

  • Butt Weld (BW):

    • Pros: Leak-proof, high integrity for permanent installations.

    • Cons: Requires skilled welding; non-removable.

  • Socket Weld (SW):

    • Pros: Easier assembly than BW; good for high-pressure small-bore lines.

    • Cons: Not ideal for thermal cycling.

  • Flanged (RF/RTJ):

    • Pros: Easy maintenance/installation.

    • Cons: Bulkier; potential leak paths at gaskets.

Recommendation: BW for critical high-P systems; SW for compact layouts.

B. Seating & Leakage

  • Metal Seats (Stellite 6/13Cr):

    • Class B leakage (API 598) – suitable for high-temp/abrasive fluids.

  • Soft Seats (PTFE):

    • Class VI (zero leakage) – limited to ≤ 250°C.

C. Operation

  • Manual (Handwheel/Gear):

    • Gear operators required for Class 1500 due to high seating torque.

  • Actuated (Pneumatic/Electric):

    • Used in automated or remote systems (e.g., offshore platforms).

5. Material & Certification Requirements

  • ASTM A105N:

    • Verify normalization heat treatment on Material Test Reports (MTRs).

  • NACE MR0175: Essential for sour gas (H₂S) applications.

  • Fire-Safe (API 607/6FA): Mandatory for hydrocarbon service.

6. Pressure-Temperature (P-T) Derating

Refer to ASME B16.34 for allowable pressures at elevated temps:

Temp (°C) Max Pressure (PSI)
38°C 1500 (Full rating)
200°C ~1350
400°C ~1000

Always design with a safety margin!

7. Top Manufacturers

Brand Key Strength
Velan High-pressure forged valves, cryogenic options
Parker Bonney Forge NACE + fire-safe compliance
Cameron Premium oil & gas valves
Emerson Reliable performance in refineries

Tip: Look for API Monogram for valves made in API-licensed facilities.

8. Inspection & Testing

  • Hydrostatic Test: 1.5x rated pressure (per API 598).

  • Seat Leakage Test: Class B (metal seats) or Class VI (soft seats).

  • Third-Party Validation: DNV, ABS, or Lloyds for critical applications.

9. Cost Estimate

  • 3″ A105N Class 1500 BW Gate Valve: $1,500–$3,500

  • With Gear Operator: +$500–$1,500

  • NACE/Fire-Safe Certified: +20–30%

10. Installation & Maintenance Tips

  • Pre-Installation:

    • Verify weld procedure specifications (WPS) for BW valves.

    • Ensure pipe alignment to avoid stress on valve body.

  • Maintenance:

    • Lubricate stems regularly in corrosive environments.

    • For metal seats, periodic lapping may be needed.

Conclusion

The 3-inch ASTM A105N Class 1500 gate valve is ideal for high-pressure, high-temperature industrial systems where forged steel reliability is critical. Prioritize:
✅ API 602 design (forged, compact)
✅ Butt weld ends for permanent installations
✅ Stellite-seated for durability
✅ NACE/fire-safe certs if applicable

Vendor Shortlist

1. Premium Brands (API 602 Compliant)

Vendor Key Offerings Contact
Velan High-pressure, cryogenic, fire-safe options www.velan.com
Parker Bonney Forge NACE MR0175, API 602, gear-operated www.parker.com
Cameron (Schlumberger) Oil & gas specialized, API Monogram valves www.cameron.slb.com
Emerson (Fisher) Refinery & petrochemical-grade valves www.emerson.com
L&T Valves Cost-effective, API-certified www.lntvalves.com

2. Reliable Distributors

Distributor Advantage Link
MRO Industrial Stocks Parker, Velan, Cameron valves www.mro-industrial.com
Trimteck Customizable actuators + valves www.trimteck.com
Valves Online Fast shipping for standard configurations www.valvesonline.com

Technical Datasheet Template

Valve Type: Forged Steel Gate Valve (API 602)
Size: 3″ (DN 80)
Material: ASTM A105N (Normalized Carbon Steel)
Pressure Class: 1500 LB (ASME B16.34)
Design Code: API 602
End Connections: Butt Weld (BW) / Socket Weld (SW) / Flanged (RF/RTJ)
Seat Material: Stellite 6 (Standard), PTFE (Optional)
Stem Material: ASTM A182 F6a (13Cr)
Leakage Class: API 598 Class B (Metal Seat), Class VI (Soft Seat)
Temperature Range: -29°C to 425°C (A105N)
Fire-Safe: API 607/6FA (Optional)
NACE Compliance: MR0175 (If sour service)
Operation: Handwheel / Gear Operator / Actuated (Pneumatic/Electric)
Testing: Hydrostatic (1.5x rated pressure), Seat Leakage (Per API 598)

Procurement Checklist

  1. Request from Vendors:

    • Material Test Reports (MTRs) for ASTM A105N.

    • API 598 Test Certificates (Hydro + Seat Leakage).

    • Fire-Safe/NACE Certifications (If applicable).

    • Dimensional Drawings (ASME B16.10 face-to-face).

  2. Compare Quotes On:

    • Lead time (Standard: 8–12 weeks; Rush: 4–6 weeks).

    • Incoterms (FOB, CIF, etc.).

    • Warranty (Typically 12–24 months).

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How to Choose the Right 3 Inch Gate Valve ASTM A105N 1500 LB

How to Choose the Right 3 Inch Gate Valve ASTM A105N 1500 LB

China 3 Inch Gate Valve

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Selecting the right 3-inch gate valve in ASTM A105N, Class 1500 LB requires careful attention to material specs, pressure ratings, design standards, and application requirements. Below is a detailed guide to ensure you choose the best valve for your needs.

1. Key Specifications for ASTM A105N Class 1500 Gate Valve

Parameter Requirement
Material ASTM A105N (Forged Carbon Steel, Normalized)
Size 3″ (DN 80)
Pressure Class ASME B16.34 Class 1500 (1500 PSI @ 38°C)
Design Standard API 602 (Compact Forged Steel Gate Valves)
End Connections Socket Weld (SW), Butt Weld (BW), or Flanged (RF/RTJ)
Temperature Range -29°C to 425°C (Higher temps require derating)
Seat/Seal Metal-to-Metal (Stellite 6 for high wear) or Soft Seat (PTFE for tight shutoff)

2. Why ASTM A105N?

  • Normalized A105 has better mechanical properties than standard A105.

  • Ideal for high-pressure, high-temperature (HPHT) oil & gas, power plants, and refineries.

  • NACE MR0175 compliant if required for sour service (H₂S environments).

3. Pressure & Temperature Considerations

  • Class 1500 LB means 1500 PSI at 38°C, but check ASME B16.34 for derating at higher temps.

  • Max Working Pressure Example:

    • @ 200°C → ~1350 PSI

    • @ 400°C → ~1000 PSI

Always confirm pressure-temperature ratings for your operating conditions.

4. Design Standards (API 602 vs. API 600)

Feature API 602 (Forged Steel, ≤ 4″) API 600 (Cast Steel, ≥ 2″)
Construction Forged (Stronger, compact) Cast (Larger, heavier)
Pressure Class Up to Class 2500 Up to Class 2500
Ends SW, BW, Threaded Mostly flanged
Leakage Class API 598 Class B (Metal Seat) API 598 Class B

For a 3-inch Class 1500 valve, API 602 is the best choice (forged, compact, high-pressure).

5. End Connection Selection

Type Pros Cons Best For
Butt Weld (BW) Leak-proof, high integrity Permanent, requires welding High-pressure pipelines
Socket Weld (SW) Easier installation than BW Not for cyclic thermal loads Small-bore high-P systems
Flanged (RF/RTJ) Easy maintenance Bulkier, potential leaks Refinery piping

Recommendation:

  • BW for permanent, critical high-pressure systems.

  • SW for compact, high-pressure but non-cyclic applications.

6. Seat & Seal Options

  • Metal Seat (Stellite 6 or 13Cr)

    • Best for high-temperature, erosive, or abrasive fluids.

    • Meets API 598 Class B leakage.

  • Soft Seat (PTFE/RPTFE)

    • Zero leakage (Class VI) but limited to ≤ 250°C.

    • Used in cryogenic or clean service.

For Class 1500, metal seats are standard.

7. Operation Method

  • Handwheel (Rising Stem) – For manual operation.

  • Gear Operator – Needed for high-torque applications.

  • Actuated (Pneumatic/Hydraulic) – For remote/automated systems.

Class 1500 valves often require gear operators due to high seating pressure.

8. Certifications & Testing

  • Mandatory:

    • API 598 (Pressure & Seat Leakage Test)

    • ASME B16.34 (Pressure-Temperature Rating)

  • Optional but Recommended:

    • NACE MR0175 (If sour service – H₂S present)

    • Fire-Safe API 607/6FA (For hydrocarbon service)

Always request Material Test Reports (MTRs) and inspection certificates.

9. Top Manufacturers & Suppliers

Brand Key Features
Velan API 602, high-pressure forged valves
Parker Bonney Forge NACE-compliant, fire-safe options
Cameron (Schlumberger) Premium oil & gas valves
Emerson (ASCO) Reliable high-PT performance
L&T Valves Cost-effective, API-certified

Tip: Check for API Monogram for valves made in API-licensed facilities.

10. Price Estimate (USD)

  • ASTM A105N, Class 1500, 3″ BW Gate Valve → $1,500 – $3,500

  • With Gear Operator → +$500 – $1,500

  • NACE/Fire-Safe Certified → +20–30% cost

Final Selection Checklist

✅ ASTM A105N material (normalized for better strength)
✅ API 602 design (forged steel, ≤ 4″)
✅ Class 1500 rating (verify P-T derating for your conditions)
✅ Butt Weld or Socket Weld ends (BW preferred for permanence)
✅ Metal seat (Stellite 6 for durability)
✅ API 598 tested + NACE if sour service
✅ Gear operator if manual operation is difficult

Conclusion

For a 3-inch ASTM A105N Class 1500 gate valve, prioritize:
✔ API 602 compliance (forged, compact, high-pressure)
✔ Butt weld ends (best for permanent, high-integrity systems)
✔ Metal-to-metal seating (Stellite for longevity)
✔ NACE certification if in sour service

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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.

3pc 316 ball valve

3pc 316 ball valve,threaded ball valve,china 3pc 316 ball valve supplier

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:

  1. 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.

trunnion mounted ball valve trim

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.

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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.

 

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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:

  1. Structure i.e., types of the valve by design.
  2. Power i.e., types of the valve by an operation.
  3. Condition i.e., types of the valve by system parameters.
  4. 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.

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.

 

 

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.

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.

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..

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 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.

 

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

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