A check valve is a type of valve which are designed to allow the flow of fluid in one directions by raising the disc by a pressure of fluid or it interrupt the flow in reverse direction by automatic lowering a disc. Definition of valve is,it is a mechanical device which are designed to control or interrupt […]
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:[email protected]
Kindly, please find the attached GA drawings and pictures of valves.
Any production arrangement where one needs to monitor, regulate, or alter the flow of a liquid media through various piping sections of a system must include control valves. Every piping system needs control valves as a crucial component.
Control valve types include ball and plug valve models that carry out comparable functions and are frequently used interchangeably. They remain unique in terms of the overall structure, function, and applied applications. This guide lists all the major differences between plug vs ball valve and other relevant information that can help people in choosing the ideal valve type for the desired applications from reliable industrial valve suppliers.
A plug valve rotates in a 90-degree turn and it regulates flow using a tapered or cylindrical stopper. The disc has a path for the flow to pass through and is shaped like a plug. The bore passage is in the flow while it is open. The heavy part of the stopper restricts the flow when it is swiveled 90 degrees from the open position.
In situations where speedy operation is necessary, it is utilized in place of a gate valve. Typically, plug valves are chosen for low-pressure and low-temperature applications. For usage with corrosive chemicals, plug valves that have body linings made of polytetrafluoroethylene (PTFE) can be utilized.
Ball valves are on or off mechanisms with a quarter-turn. The valve’s movable ball, which is located in the center, regulates the flow of gas or fluid media. The rotary ball, which serves as the pivot, is made with a hole in the middle. The ball is swiveled to open or shut down the valve via a stem on its top. The stem can be swiveled manually or automatically using levers.
Steel, bronze, iron, brass, or PVC are the materials that ball valves are most frequently composed of. Multiple ports, or apertures in the valve, are possible with ball valves. Two-port ball valves are utilized for conventional on or off control and retain double ports. Applications that need more than one media source or that require diverting media in various directions employ multi-port valves, such as 3-way valves, 4-way valves, etc.).
Check out the main differences between ball valves and plug valves.
The different types of plug valves vs ball valves are listed below.
Most plug valves are full bore, especially rectangular port valves. Round port and diamond port valves can also be used, but their usage is quite limited to low-pressure applications. Lubricated plug valves and non-lubricated plug valves are the two types of plug valves.
The plug of lubricated plug valves is typically made of metal and possesses a lubricant chamber that maintains lubrication all the time. The lubricated plug moves more easily, experiences less friction, and is corrosion-resistant. Lubricated plug valves can deal with larger and high-temperature applications.
A form of control valve that has numerous applications is the ball valve. In accordance with their construction and purpose, they are available in a variety of sizes and shapes. Because of this, they are currently among the valves used most frequently in the pipe industry. There are ball valves with full and reduced bores.
Full bore ball valves enable unrestricted medium flow. As the bore is less than the diameter of the pipeline, reduced bore or reduced port valves restrict the media flow. Ball valves can be mounted on a float or trunnion. Floating ball valves are utilized in applications where a bi-directional shut-off is necessary. High-pressure, high-temperature applications use ball valves with trunnion installation.
The structural difference between plug and ball valve is mentioned here.
A plug valve, which has a conical tapering or cylindrical disc, regulates the flow of liquid through one or additional sideway-moving passageways. The hollow tunnel aligns with the flow when the valve is open, enabling the liquid to flow freely. The plug is realigned to restrict the flow after a 90-degree rotation shuts down the valve.
The plug valve is a compact, straightforward device that alters the flow of media by cutting or dispersing. Although some specialized varieties of plug valves can function in high-temperature situations, their primary applications are in medium or low-pressure and low-temperature environments.
The ball valve is an altered plug valve that has a spherical disc and a circular bore channel. The port is a hole that exists in the disc. The valve is open, and the medium seeps through it when the port is in line with the dual ends of the valve. The flow ceases when the port is vertical to the valve ends.
Ball valves are useful for a range of systems due to their small structure, simple use and upkeep, and compatibility with water, acids, natural gas, and solvents. Even in the extreme operating environments of media like hydrogen peroxide, oxygen, methane, or ethylene, ball valves are an excellent choice. Traditional gas shutdown ball valves are best suited for open and close operations, while more sophisticated or customized models also deliver flow control and throttling features.
The plug valves and ball valves operate with a rapid 90-degree rotation of the actuator, making them quarter-turn valves that open and close. Their main function is sealing and shut-off procedures. The plug valve’s sealing surface is substantially greater than a ball valve. Better sealing properties result from this, but it also entails greater torque and more work during operation.
Ball valves are somewhat simpler to regulate than plug valves because of their torque-free functioning and lightweight feature. Despite the possibility that their tiny sealing surface may result in poor sealing performance, developments in chemical sealants and seal injections have helped to address this flaw.
Both plug and ball valves have bored discs in the middle. A ball valve features a spherical disc with a hollow center. A plug valve is composed of a conical or cylindrical disc with drilled apertures. The disc or ball in a plug valve is larger than the disc or ball in a ball valve, and it enables a plug valve to provide a tighter shut-off than a ball valve. Plug valves are also more compact than ball valves. Plug valves can be effortlessly positioned in tinier departments because of their low footprint.
The plug valve gave rise to the ball valve. They both rotate at 90 degrees, and based on whatever “plug” is being used, it can be a plug or a ball with a circular through hole or channel running through its center. The ball and ports should be arranged so that the sphere will appear as a sphere at the intake and outlet to stop the flow when rotated by 90 degrees.
The upper components of the plug valve, the conical plug, and the body surface created by the conical pressure are sealed with packing in the space between the plug and the body. Since plug valves typically do not retain bonnets and the handles are exposed outdoors at the end, they are easy to use and frequently inexpensive.
A number of actuators, such as manual, pneumatic, hydraulic, electric, and other types, can be used to operate ball valves. They are easy to open and shut down and need little force, even while functioning in high-pressure circumstances.
Plug valves can be opened and closed manually or electrically using actuators. Despite being relatively expensive to install, pneumatic actuators can also be utilized to regulate them. Plug valves in high-pressure applications may be challenging to open and stop due to the substantial amount of torque. Because of this, plug valves are rarely used in larger applications.
The plug valve costs considerably less than ball valves. The “plug” is completely covered by the bushing, which deters wear on the valve body and plug. By changing the bushing and top seal, which can withstand 300°C of continuous use, the valve can be updated and repaired.
All other components of the plug valve are cast in a single step, and only the top face and flange need to be processed. However, the internal body does not need processing. Comparing the plug valve to the ball valve, there is a clear cost advantage of choosing plug valves.
In general, ball valves last longer than plug valves. A plug valve possesses a bigger surface area in contact with the medium and is required to deal with more torque. It shows that the valve has undergone greater deterioration and is more vulnerable to corrosion.
Ball valves have unique features that stop the medium from constantly contacting the disc. Even though there will be more moving parts, the low torque ensures that it will last longer with little to no wear and tear.
Even though it is only partially achievable, plug valve customization is also an option. It is possible because of their basic design, which offers little potential for development. There are many sizes of multi-port plug valves, varying from two to five ports.
Multiport valves need to be used carefully because they might not create a very tight shut-off. The expense of all additional plug valve modifications, like the addition of electric or pneumatic actuators or anti-friction components, is relatively expensive.
Compared to plug valves, ball valves offer a significant increase in adjustability. It is because there are so many different types of ball valves accessible in the marketplace. Ball valves come in unidirectional, bidirectional, and multidirectional varieties.
They can retain one, two, or three pieces with one or more ports. Ball valves with split-body, top-entry, end-entry, and side-entry options are accessible. Ball valves can also be equipped with double block and bleed capacities.
Both ball and plug valves require routine upkeep to operate effectively. Plug valves contain fewer moving components and simpler construction, making them relatively easy to maintain. Additionally, you can simply reach the remaining valve body for easy cleaning after eliminating and cleaning the plug.
Ball valves are more difficult to clean since the ball or disc is buried deep inside the valve and is hard to access. The ball valve’s body chamber may gather significant debris over time, adding to the problems of cleaning and maintaining it.
In comparison to ball valves, plug valves provide low-cost operations. It is so that the valve body and plug would not wear out as the plug fits underneath the bushing with a plug valve. In order to update and maintain the valve’s optimal function and
Here are the top three primary reasons that explain why the plug valves are better compared to ball valves:
By understanding the type of valve application, it can become easy to choose between ball valves and plug valves.
For bubble-tight shut-off, plug valves are used in liquid applications like vapor, air, gas, hydrocarbon, and others. Since they have a larger surface area and provide unrestricted medium flow, plug valves are frequently employed in slurries, sewage, and mud applications.
In order to ensure good sealing while working with corrosive or hard materials, strengthened plug valves are used. Because of their straightforward operational structure and anti-corrosion qualities, they are the most dependable shutdown option in sensitive applications.
There are many applications for ball valves, and they are used in a variety of equipment, including generator skids, compressor skids, gas feed lines, crude oil plants, LNG plants, industrial gas processing plants, polymer plants, field gas plants, hydrocarbon processing, oil refinery feedstock lines, tank farms, separator skids, and automated process applications.
High-pressure ball valves are necessary for cryogenic, subterranean, and subsea applications. In addition, ball valves made of stainless steel are necessary for brewing, desalination, feedwater, cooling water, and petroleum refining.
Valves come in a variety of types, sizes, lifetime, purposes, and control capabilities. Plug valves and ball valves have the same purpose. They both regulate the flow of gas or fluid using either a straightforward on or off function or a multipath feature.
Due to their flexibility in high-pressure applications, ball valves are excellent choices. Whereas the plug valves can be maintained easily since they have easy construction and not too many moving components. It is possible to acquire ball valves and plug valves in bulk orders from a professional valve manufacturer.
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:
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.
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 “#”:
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.
Check out the details of the ANSI flange pressure ratings chart about class 1 flanges.
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:
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 [email protected]
For industrial valves, Europe is the world’s largest manufacturer of oil and gas valves. The 8 % market in the United States is accounted for by ball valves. After China and Germany, Italy was the third-largest exporter of industrial valves in 2016. In this post, you’ll learn about the top ball valve manufacturers in Europe, giving you additional alternatives when it comes to choosing the correct type of ball valve.
Finding the proper business partner for effective operations is critical for anyone involved in the oil and gas industry. However, in an industry as big as the oil and gas industry, finding the ideal fit that meets all of your business criteria is not always straightforward.
In order to meet this challenge, numerous reputed online B2B platforms have been developed specifically for this dynamic industrial landscape, and to make things easy we have compiled a list of some of the most reputable high-performance ball valve manufacturing businesses.
Europe’s top high-performance valve manufacturers are listed below
Located in:Spain.
Founded in: 1976
Certificates: EACC 9001 / 14001 / 18001
In 1967, Babcock Wilcox Española -present in the Spanish market since 1918- implemented its diversification policy by setting up a valve manufacturing division, which soon became one of the leading players on the international market
Located in: Germany
Founded in: 1956
Certificates: DIN EN ISO 9001, API 6D and API 6SS, PED (CE), GOST/EAC, CRN.
Source: BOHMER
BOHMER is one of the world’s major manufacturers of ball valves. They use careful coordination of design, materials and technologies to produce the best ball valve for your application.
Böhmer has been interchangeable for over 60 years, with absolute durability and safety. DN3 to DN 1400 (1/8-56 inch) ball valves are strong enough for your application.
Böhmer valves are widely used in the manufacturing business, as well as in the oil and gas industry. Similarly, with district heating pipes and networks.
Located in: Czech Republic
Founded in: 1993
Certificates: TUV, GOST R, Lloyd’s Register, ABS, DVGW, or API 609-0068.
Source: ABO
With over two decades of experience, ABO is a leading manufacturer of high-quality industrial valves. ABO specializes in PTFE lined ball valves, double and triple offset high-efficiency valves for the chemical, power, oil & gas, shipbuilding industries and resilient seated ball valves.
Located in: Tarragona, Spain.
Founded in: 1970s.
Certificates: ISO 9001, BS OHSAS 18001 and ISO 14001.
Source: ECONTROL
Control valves are designed, manufactured, and operated by ECONTROL, the indisputable European leader. Every year, ECONTROL Spain produces and ships about 5,000 control valves.
In the regulation service, the ECONTROL VC-100 and VC-101 globe control valves are reliable products. The VC-100s are ECONTROL’s most significant contribution to the process industries in Europe and around the world, and they’ve been in use for more than three decades.
Located in: Tilburg, The Netherlands
Founded in: 2000
Certificates: PN16-PN420
Source: Maverick Valves Manufacturing HQ BV
Maverick Valves Manufacturing HQ BV specializes in the manufacture and distribution of high alloy steel and titanium valves, both standard and custom-made.
Maverick develops and distributes custom-designed valves in various grades of high alloy materials, according to customer specifications. Sizes range from 12 to 56 inches (DN15-DN1400), with class ratings ranging from 150 to 4500 pounds (PN16-PN420).
Located in: London, UK.
Founded in: 1970
Certificates: API/BS/EN/AWWA/ISO etc
Source: LEAD (UK)
LEAD (UK) is a technology-based firm that started valve engineering in the Oil & Gas sector. LEAD (UK) developed a workshop on industrial pipeline valves after eight years of expansion, progressively expanding the range of products with Globe/Check Gate Valves for Gas& Oil and Water Works Treatment. Lead Valve boosted its production capacity in 2008 to meet expanding global market demand. Iron, steel, and special alloy materials are used in global valves, which meet international criteria such as API/BS/EN/AWWA/ISO, among others.
Located in: Hamburg, Germany.
Founded in: 1818
Certificates: ISO 9001, API, Etc.
Source: LESER
The LESER, a Hamburg-based company, is the largest manufacturer of safety valves in Europe and one of the leading firms globally, with 1,050 employees, eight branches, and distribution colleagues in more than 80 countries. LESER produces more than 130,000 safety valves each year for global markets in Hohenwestedt, Germany, as well as for local markets in Pathain, India, and Tianjin, China. LESER’s production is characterised by a great depth of production.
Located in: Bergamo, Italy
Founded in: 1973
Certificates: ISO 9001, ISO 15848, API 602, API 6A, etc.
Source: OMB Valves Company
The OMB Valves Company is a valve manufacturer with a wide range of products for the oil industry. OMB is a family-owned and operated business that specializes in valves for the oil and gas, fuel, marine, and aerospace industries.
Engineered valves for heavy applications with a focus on high-pressure operation are their speciality. The company has had a Local Purchasing and Local Production strategy from its inception to promote the growth of the communities where it works and operates.
Located in: Milano, Italy
Founded in: 1919
Source: Galli&Cassina
Galli&Cassina is a major Italian valve manufacturer and a forerunner in the design and production of a full range of plug valves.
G&C began a massive development of Plug Valves to service the oil and gas sector around the globe and is currently one of the leading suppliers for all foreign oil and gas companies.
Industrial valves are in increased demand around the world, and producers are ready to meet the need. High-performance ball valve vendors in the United States and China can also provide you with high-quality valves. More fantastic vendors may be found in this comprehensive reference to valve manufacturers in Europe. If you are intrigued to know more, why not contact us at China
Table of Contents
A bellows seal globe valve is an essential component in many industries, such as chemical, oil and gas, and petrochemical industries. It is a type of industrial valve used to regulate and control the flow of fluids, gases, and other media through a pipeline or system. These bellows valves are widely used because of their unique design, which includes a bellows seal that protects the stem from corrosion and prevents fluid from eroding the stem. So it’s very common to see the condition for corrosive or toxic media.
The bellows seal globe valve consists of body, disc, stem, bonnet, bellows seal, and packing. The valve body is the primary component that houses the valve disc, which controls the flow of media. The valve stem connects the valve disc to the actuator or handwheel, which opens or closes the valve. The bonnet covers the stem and packing and the bellows valve provides a seal to prevent leakage. The following is the photo of bellow seal globe valve.
| No. | Parts Name | Materials | ||
| 1 | Body | GS-C25/1.0619 | CF8/1.4301 | CF8M/1.4408 |
| 2 | Seat | Overlay 13Cr | SS304 | SS316 |
| 3 | Disc surface | Overlay 13Cr | SS304 | SS316 |
| 4 | Stem | X20Cr13 | SS304 | SS316 |
| 5 | Bellows | SS304/SS316/SS321/SS316T1 | SS304/SS316/SS321/SS316H | SS316/SS321/SS3167I |
| 6 | Gasket | Graphite+SS | Graphrte+SS | Graphite+SS |
| 7 | Bellows cover | SS304ZSS316 | SS304/SS316 | SS316 |
| 8 | Bonnet | GS-C25/1.0619 | CF8/1.4301 | CF8M/1.4408 |
| 9 | Nut | A194 2H | A194 8 | A194 8M |
| 10 | Bolt | A193 B7 | A193 B8 | A193 B8M |
| 11 | Packing | Graphite | Graphite | Graphite |
| 12 | Gland | c.s | CF8 | CF8M |
| 13 | Pin | Steel | Steel | Steel |
| 14 | Guide piece | Steel | Steel | Steel |
| 15 | Stem nut | Ductile iron | Copper alloy | Copper alloy |
| 16 | Grease Nipple | H2 | H2 | H2 |
| 17 | Hand wheel | Steel | Steel | Steel |
| 18 | Lock nut | A105 | A105 | A105 |
There are several types of bellows seal valves and globe valves available in the market, each with unique design features and applications. Here are some of the most common types of bellows seal globe valves:
This type of valve has welded metal bellows that provides a flexible, leak-proof seal and protects the stem from corrosion. Welded ends bellows seal globe valves are ideal for high-temperature and high-pressure applications.
This type of valve has a flanged connection that makes it easy to install and remove. Flanged bellows seal globe valves are suitable for applications that require frequent maintenance and inspection.
This type of valve has socket-welded connection ends which are suitable for high-pressure applications.
This type of valve has a threaded connection that makes it easy to install and remove. Threaded bellows seal globe valves are commonly used for small pipeline.
This type of valve has extended bellows that provide additional protection against corrosion and allows the valve to operate at extreme temperatures and pressures.
The Y-Type Bellows Seal Globe Valve is an exceptionally secure and reliable component, featuring a double sealing structure of bellows and packing. This ensures complete protection from any potential leakage at the stem, making it ideal for use in pipelines carrying dangerous, flammable, explosive, toxic or valuable substances. Additionally, its construction ensures tight seals are maintained under high temperatures and pressures, while also minimizing any risk of leaks.
STV VALVE is a reliable globe valve manufacturer that has been producing high-quality industrial valves for over three decades. Our valves are made from high-quality materials and are designed to meet the specific needs of each application, just feel free to contact us for a free consultation.
A globe valve and a bellows seal globe valve both belong to the family of globe valves, which are used to control the flow of fluids through a pipeline or system. However, the primary difference between them is the presence of a bellows seal in a bellows seal globe valve. A bellows seal is a flexible metal component that provides a leak-proof seal and protects the stem from corrosion, which makes the bellows seal globe valve more suitable for applications that require high performance and reliability.
The primary purpose of bellows in valves is to provide a flexible, leak-proof seal that protects the stem from corrosion and prevents fluid from eroding the stem. Bellows are also used to compensate for changes in temperature and pressure in the system, which allows the valve to operate smoothly and efficiently.
The primary difference between a bellows seal valve and a common valve is the presence of a bellows seal. A bellows seal valve has flexible metal bellows that provide a leak-proof seal and protect the stem from corrosion, while a normal valve does not have this feature.
A bellows seal is a flexible metal component that is used in valves to provide a leak-proof seal and protect the stem from corrosion. The bellows seal consists of metal bellows that is welded to the stem and a packing gland that secures the bellows in place.
The primary reason for using bellows in a valve is to provide a flexible, leak-proof seal that protects the stem from corrosion and prevents fluid from eroding the stem. Bellows are also used to compensate for changes in temperature and pressure in the system, which allows the valve to operate smoothly and efficiently.
Bellows work by expanding and contracting to compensate for changes in temperature and pressure in the system. When the temperature or pressure in the system changes, the bellows expand or contracts to allow the valve stem to move freely, which prevents damage to the valve and ensures smooth operation.
There are three types of valve seals: packing, mechanical, and bellows.
Packing seals use a flexible material, such as graphite, to provide a seal around the stem. Mechanical seals use a rotating component to provide a seal, while bellows seals use a flexible metal component to provide a leak-proof seal and protect the stem from corrosion.
The two basic types of valve seals are static and dynamic. Static seals provide a seal between two stationary components, while dynamic seals provide a seal between two moving components.
One of the primary disadvantages of bellows is that they can fail over time, which can lead to leakage and other issues. Bellows can also be more expensive than other types of valve seals, which can make them less suitable for certain applications.
Bellows failure can occur due to a variety of factors, such as fatigue, corrosion, or mechanical damage. When a bellows fails, it can lead to leakage, reduced valve performance, and other issues. Regular inspection and maintenance can help prevent bellows failure and ensure the continued performance of the valve.
The operational principle of a bellows seal globe valve is based on its unique design, which includes a bellows seal that protects the stem from corrosion and prevents fluid from eroding the stem. The valve consists of a valve body, a valve disc, a valve stem, a bonnet, a bellows seal, and packing.
When the valve is in the open position, the valve disc is lifted away from the valve seat, allowing media to flow through the valve. The stem and the disc move together as the stem is rotated by the actuator. When the valve is in the closed position, the valve disc is pressed against the valve seat, preventing media from flowing through the valve.
| Parameter | Globe Valve | Ball Valve | Butterfly Valve | Gate Valve | Diaphragm Valve | Bellows Seal Globe Valve |
|---|---|---|---|---|---|---|
| Flow control | Excellent | Good | Good | Not Suitable | Good | Excellent |
| Leakage | Low | Low | Low | Low | Very Low | Very low(Zero Leakage) |
| Corrosion resistance | Good | Good | Good | High | High | Very high |
| Maintenance | Moderate | Moderate | Moderate | Low | Low | Low |
| Temperature range | -20°C to 500°C | -40°C to 200°C | -20°C to 120°C | -29°C to 425°C | -29°C to 150°C | -196°C to 600°C |
| Pressure range | Up to 2500 psi | Up to 1000 psi | Up to 150 psi | Up to 5000 psi | Up to 200 psi | Up to 2500 psi |
| Applications | Water, steam, gases, oils | Water, gases, oils | Water, air, gases | Steam, water, gases, oils | Slurries, viscous fluids, corrosive chemicals | Corrosive fluids, high temperature, and high pressure applications |
The bellows seal globe valve is widely used in industries where leak-proof and corrosion-resistant valves are required. Some common applications of the bellows seal globe valve are:
Here are some reliable bellow seal globe valves manufacturer in China for your reference.
The primary difference between a bellows seal valve and a traditional valve is the presence of a bellows seal. A bellows seal valve has flexible metal bellows that provide a leak-proof seal and protect the stem from corrosion, while a traditional valve does not have this feature.
Selecting the right bellows seal globe valve for your application is crucial to ensure optimal performance, reliability, and safety. Here are some factors to consider when selecting the right bellows seal globe valve for your application:
Bellows seal globe valves offer several advantages in high-pressure and high-temperature applications, making them a popular choice for such applications. Here are some of the advantages of using bellows seal globe valves in high-pressure and high-temperature applications:
The frequency of bellows seal replacement in bellows seal globe valves depends on several factors, such as the type of fluid being transported, operating conditions, and the quality of the bellows seal.
In general, bellows seal replacement is typically required when there is evidence of seal failures, such as leakage or reduced performance. Regular inspection and maintenance can help detect signs of bellows seal failure and prevent unexpected downtime or safety hazards.
The recommended replacement interval for bellows seals can vary depending on the application and the manufacturer’s guidelines. However, a general rule of thumb is to replace the bellows seal every 2-3 years or when there is evidence of seal failure, such as leakage or reduced performance.
It is important to note that regular inspection and maintenance are crucial to ensuring the proper functioning of the bellows seal globe valve. This includes checking the bellows seal for signs of wear and damage, inspecting the stem and disc for proper alignment, and ensuring that the valve is properly lubricated.
By following the manufacturer’s guidelines and performing regular inspection and maintenance, you can ensure that the bellows seal globe valve operates safely and efficiently and that the bellows seal is replaced as needed to prevent leakage and other issues.
Here is a table outlining some common issues that can arise with bellows seal globe valves and possible troubleshooting steps:
| Issue | Possible Causes | Troubleshooting Steps |
|---|---|---|
| Leakage | Damaged or worn bellows seal, improperly installed valve, damaged valve body or disc, excessive fluid pressure or temperature | Inspect bellows seal for signs of wear or damage, check valve installation for proper alignment and torque, inspect valve body and disc for signs of damage, check fluid pressure and temperature to ensure they are within valve limits |
| Valve does not close completely | Improperly adjusted actuator, damaged valve disc or seat, obstruction in valve body | Check actuator settings and adjust if necessary, inspect valve disc and seat for signs of damage or wear, inspect valve body for obstructions and remove if necessary |
| Excessive noise or vibration | Misaligned valve components, excessive fluid pressure or flow rate, worn valve components | Inspect valve components for proper alignment, check fluid pressure and flow rate to ensure they are within valve limits, inspect valve components for signs of wear and replace as needed |
| Difficult to operate | Damaged or worn stem or packing, improper lubrication, misaligned valve components | Inspect stem and packing for signs of damage or wear, lubricate valve components according to manufacturer’s recommendations, inspect valve components for proper alignment |
| Corrosion | Exposure to corrosive fluids or environments, low-quality materials | Select valve materials that are resistant to corrosion, ensure proper maintenance and cleaning to prevent corrosion buildup |
In conclusion, the bellows seal globe valve is an essential component in many industries due to its unique design and functionality. Its ability to provide a leak-proof and corrosion-resistant seal makes it an excellent choice for applications that require high performance and reliability. We hope that this article provides you with valuable insights into the design, functionality, and applications of the bellows seal globe valve. Please do not hesitate to contact us if you have any questions or comments. STV is your reliable industrial valve partner here.
