612 A ShenHui Building XIXIAN Road Baoan District Shenzhen 518000 Guangdong China
Our Advantage:
We are a manufacturer, produce&sell ourselves
Fully support customer customized valves
MOQ：1 Piece
Accept OEM, ODM
Purchasing Valves from a Trustworthy Trunnion Ball Valve Manufacturer
It is common knowledge that various companies create different kinds of ball valves. Therefore, finding a dependable trunnion ball valve manufacturer is crucial for business owners in the manufacturing industry. There are several factors to consider when making this decision. Here are some key points to keep in mind:
Product details: The first step is to establish specific requirements that will help in selecting the right supplier. For example, understanding the type of fluids involved will help in determining the material and type of trunnion ball valves needed. Furthermore, knowing the intended applications will assist in deciding on the appropriate configuration and specifications for the ball valve.
Temperature & Pressure specifications: Providing accurate information on the minimum and maximum temperature and pressure levels is vital when selecting the right type of ball valve. This will help narrow down the list of companies that offer suitable ball valves, making the decision-making process easier. It is important to note that the material and sealing properties of the ball valve can impact its performance in the operational environment.
Cost and Volume Orders: Keep in mind that custom trunnion ball valve makers might require more time compared to those offering standard options. Keep in mind the durability when placing large orders.
Certifications: Being aware of the necessary certifications can help assess the reliability and honesty of the provider. Suppliers with certifications guarantee the basic standards needed in trunnion ball valve production at fair prices. Key certifications to look for include API 6D, API 598, NEMA, ANSI, and NSF.
Delivery Time: The time it takes to deliver the product can be crucial when selecting a supplier. While longer delivery times can have advantages, it is not ideal to wait too long when dealing with hazardous materials.
Customer Support: Lastly, it is important to know if the supplier is actively involved with customers in terms of satisfaction, specifications, needs, and feedback.
How is a Trunnion Mounted Ball Valve Constructed?
Trunnion-mounted ball valves share a resemblance with conventional ball valves. The key distinction lies in the presence of extra mechanical support for the ball or disk. In this configuration, the ball is anchored from both ends along the x-axis, ensuring stability and manageability. Let's explore the various components of a trunnion-mounted ball valve.
Body
The outer casing of a trunnion mounted ball valve, known as the body, encases and safeguards the internal mechanisms. It can be constructed from various materials like carbon steel, stainless steel, and more, chosen based on the specific usage. Metal seat ball valves and carbon steel ball valves are ideal for high-temperature environments.
Stem
The stem of a trunnion mounted ball valve links the ball to the actuator, controlling the ball's movement through welded connections. These valves are equipped with reinforced stems to prevent blowouts, enabling them to withstand extreme temperatures without damage.
Seats
The seats of a trunnion-mounted ball valve encircle the ball, ensuring a tight seal when the actuator is engaged. These valves feature spring-loaded seats that press against the ball, maintaining a secure closure.
Trunnion
What exactly is a trunnion in a valve? In a ball valve with a trunnion mount, there is an extra shaft that supports the ball from below. This shaft, called a trunnion, ensures that the ball stays securely in place. In certain ball valves, the trunnion is an extension of the ball, while in others it is connected to the ball through welded joints.
Disk
The ball in a trunnion mounted ball valve is shaped like a solid, perforated disk. One end of the ball is connected to the stem, while the other end is connected to the trunnion. In a trunnion ball valve, the ball or disk is held in position while it rotates. This design ensures that the seats are always in contact with the ball, reducing the amount of torque required.
Valve Actuator
The actuator in a trunnion ball valve is responsible for opening and closing the valve. There are various types of actuators used in ball valves, depending on the specific application and medium being used. Examples include air-operated ball valves, bare stem, gear, hand lever, pneumatic actuator, and hydraulic actuator. Additionally, gas actuators, gas-over-oil actuators, motor-operated actuators, hydraulic/electric actuators, and hydraulic-operated actuators can also be used.
How do Trunnion Mounted Ball Valves Work?
Trunnion mounted ball valves are valves that require a quarter-turn to open or close. To operate them, you simply need to turn the actuator at a 90-degree angle. When the actuator is turned, the ball inside the valve rotates to allow the medium to flow through the pipeline. Turning the handle again will move the ball to block the flow by facing the bore away from the pipeline.
For instance, if you need to control the oil flow in a critical process unit, you can use a three-piece, half-bore, split-body ball valve like the SIO Trunnion Mounted Ball Valve. To start the oil flow, you would turn the actuator on the valve 90 degrees in one direction (usually clockwise). The actuator is connected to the stem, which in turn moves the ball so that the bore faces the pipeline. Since this is a half-bore valve, the oil flow is restricted, reducing the pressure at which the oil flows.
To halt the movement of liquid, you twist the handle again, causing both the rod and the sphere to shift. The opening of the sphere now points away from the pipe, stopping the flow. The force from the liquid on the valve pushes the seals towards the sphere, creating a secure closure. The spring-loaded seals of a trunnion mounted ball valve can be pressed against the sphere even with minimal pressure. This secure closure not only stops the flow of oil, but also prevents oil from entering the inner components of the valve.
Trunnion mounted ball valves are utilized in applications with both high and low pressure. In high-pressure scenarios, the valve maintains its stability as any additional pressure on the seals and sphere is absorbed by the trunnion. In low-pressure situations, the spring-loaded seals of the valve move closer to the sphere to create a strong seal.
What are the Advantages of Using Trunnion Ball Valves?
Trunnion mounted ball valves are very popular in the piping industry. That is because they can handle different kinds of applications and mediums including liquid, gasses, and slurries. Here are some of the most favorable advantages of using trunnion mounted ball valves.
No Size Limit
Trunnion mounted ball valves can be found in all kinds of sizes. Two and three-piece ball valves can house large sized balls so they are perfect for larger applications. Single unit trunnion mounted ball valves can be used for smaller, low-pressure applications. Since they can handle high-pressure operations, trunnion mounted ball valves are also suitable for critical operations.
Customizable Features
Trunnion mounted ball valves can have many value-added features. You can fortify the seats and the ball with injections to make them seal tightly. The bearings and bolts can be made corrosion-resistant increasing the valve’s longevity. Larger valves can be equipped with lifting lugs.
Spring-Loaded Seats
The basic difference between floating ball valves and trunnion mounting ball valves is that the latter has spring-loaded seats. In a floating ball valve, the pressure of the onstream forces the ball to move towards the seats creating a seal. However, the ball needs high pressure to do so. This makes floating ball valves ineffective in low-pressure situations. In trunnion-mounted ball valves the pressure from the onstream activates the spring-loaded seats so that they move towards the ball that is held in place by the trunnion. This creates a tighter seal and makes the valve efficient in both high and low-pressure situations.
Ease of Operation
Any added pressure on the valve is absorbed by the trunnion and the stem. This means the valve needs a lower operating torque and a smaller actuator. This reduces costs and makes it easier to operate the valve. Three-piece trunnion mounted ball valves are also easy to repair, clean, replace, and maintain as you only have to remove one piece to access the working parts of the valve.
Where is Trunnion Ball Valve Used?
As already mentioned, a trunnion ball valve is versatile and can be put into many different uses. Some of its common applications are as follows:
Chemical manufacturing operations: These plants have a lot of movement of fluids. These gasses and liquids are transmitted over long distances via trunnion ball valves. They are extensively used when there are acids and strong bases, as high temperatures can damage the surrounding operators and cause danger. The trunnion ball valve’s security and sealing helps it withstand high temperature and thus prevent such situations from taking place.
Petroleum industry: Another place where trunnion ball valves are put into action is in petroleum and other fuel industries. Normally, petroleum operations choose those ball valves that adhere to API 6D standards of manufacturing and application as trunnion ball valves are sturdy enough to withstand extreme conditions during operations. Large-scale industries prefer those ball valves which can prevent leakage and withstand extreme pressures to which they are exposed.
Power industry: As power is derived from the movement of various fuels, transferring these essential fluids without leakage or wastage becomes essential for power-driven industries. Here, trunnion ball valves ensure high control over such resources, especially temperature and pressure.
What is ball valve trunnion mounted?
A trunnion-mounted ball valve includes a ball attached to a trunnion at the base. The ball valve is then connected to a stem. The main distinction between trunnion ball valves and floating ones is the minimal friction, allowing for fluid to flow smoothly with less pressure. Additionally, it requires less torque. Many industrial facilities utilize trunnion ball valves with securely welded parts.
Pros
Less torque: Trunnion mounted ball valves do not require much torque forces to operate, unlike floating ball valves that rely on torque.
Versatile: Trunnion mounted ball valves are versatile, meaning that they can be used for both small-scale domestic applications as well as large-scale manufacturing operations
No friction: Trunnion ball valves provide little to no friction and pressure on the walls, preventing compartmental depletion
Full sealing: Trunnion ball valves secure the openings fully
Cons
Expensive maintenance: As Trunnion ball valves are strongly joined together through the welding process, their maintenance and repair can be an expensive ordeal. Ball valve trunnion mounted can also be difficult to put them back together once broken. Hence, they disturb the normal manufacturing process.
Obligatory repairs: Sacrificing maintenance can decrease the quality of its working by increasing the degree of friction. As trunnion ball valves are welded together, regular maintenance is a must.
Trunnion ball valve Typical Material:
The Trunnion ball valve is accessible in forged or cast body materials (split or mono-block). Forged structures are often used for valves of high-pressure and larger bore sizes.
Typical materials for trunnion mounted ball valve design include:
1. Body/Closures: F304L, A105, A182 F304, F316, F51, F316L, F53, A350 LF2, LF3, Inconel, Monel, Hastelloy(Forging), A351 CF3, A351 CF8, A216 WCB, A351 CF3M, A351 CF8M, A890 4A/ 5A, A352 LCC/ LCB (Casting)
2. Ball: CS+ENP, F304L, F316, A182 F304, F316L, F51, CS+TCC, CS+Ni60, F53
3. Seat retainer: A182 F304, CS+ENP, F304L, F316, F51, F53, F316L, CS+Ni55, CS+TCC.
4. Stem: A182 F51, A182 F6a, A182 F316, 17-4PH,
5. Packing: RPTFE, Graphite, PTFE,
SEAT MATERIAL
PTFE: Virgin PTFE is by far the most commonly used sealing material of exceptional quality. It has attributes suitable for most services. It’s of outstanding chemical resistance across the valve and also has low friction coefficient.
RPTFE: RPTFE (known as Reinforced PTFE) is usually created by adding 15 percent of fiberglass to virgin PTFE. It has improved pressure-temperature capabilities than the virgin PTFE and comes with enhanced wear resistance. It is effective against deformation when on load.
PCTFE: PCTFE is a chlorotrifluoroethylene homopolymer with high tensile stress and have a low deformation when on load.
Nylon 6: Nylon is a rising seat material for Valves of Class 600. It is extremely robust and can be useful in oil, air, and other media. It is appropriate for strong oxidizing agents.
Devlon: Devlon is a strong molecular weight polyamide especially suited to high temperature and pressure applications in the gas and oil industry. In addition, it is a minimal moisture absorption material.
PEEK: PEEK is an advanced high-performance thermoplastic. It is really good at continuous exposure to hot water and chemicals owing to its high resistance.
PPL: PPL(Polyparaphenylene) is an exceptional seat material which has a low coefficient of friction. It can withstand extreme pressure and also temperature resistant.
TFM: TFM (modified PTFE) is an improved chemical-modified PTFE design with improved properties whilst retaining the proven benefits of conventional PTFE.
Metal: Metal (typically stellite) seats are employed in situations of hydraulic shock, flashing abrasive media, and in extreme situations.
O-RINGS MATERIAL
NBR Buna-N: NBR Buna-N (NBR) is a durable and all-purpose polymer of hard water, oil, solvent, and hydraulic fluids.
HNBR: HNBR (Hydrogenated NBR) can be compared to NBR in terms of media stability but comes with much better oxidation and heat stability.
Viton: Viton (fluorocarbon) is an elastomer of fluorocarbons that is compliant with a wide variety of chemical Substances. It produces strong performance in mineral acids, chlorinated hydrocarbons, salt solutions, and petroleum oil.
EPDM: EPDM has good resistance to abrasion and tear, with outstanding chemical resistance to a range of alkaline and acids. This is susceptible to oil, strong acids, and strong alkaline and should not be applied in compressed airlines.
FVMQ Fluorosilcione: FVMQ Fluorosilcione is a fluorinated side-chain silicone polymer chain for better oil resistance. The physical and mechanical properties closely mimic those of silicone.
Why and How to Maintain Trunnion Ball Valves?
Ensuring Trunnion ball valves are operating at their best is crucial. Proper maintenance of all valves is essential to prolong their use in installations.
Although soft seated valves provide the convenience of a quarter turn, they are only appropriate for clean services. Since most services are not entirely clean, maintenance options are necessary. For example, in the case of Trunnion ball valves, using emergency sealant injection can sometimes draw debris to the seat, causing additional damage.
Flushing is Necessary
In order to clean effectively, a flushing agent is necessary. To prevent rust and damage, moving parts must be continuously lubricated. The Trunnion mounted ball valve ensures proper control valves and fittings, including body, ventilation, drain fittings, packing injectors, and lift lines. In case of emergency, synthetic lubricants can be injected to seal leaking seats. Even the smallest amount of pollutants can affect soft seat inserts, so it is important to use flushing agents to remove grease and debris. Construction debris left in the line can contaminate soft seated valves, so it is recommended to purge the line with nitrogen before operating. Injecting sealant into the seating area can reduce valve torque by up to 40 percent, and many operators choose to keep synthetic lubricant in the seating area for this purpose.
Repairs and Spraying are Crucial
Using a spray is a recommended way to maintain a Trunnion ball valve. Neglecting to remove impurities from the valve seat can lead to an 80% increase in torque, causing issues with emergency shutdowns and valve functionality.
Regular inspections and maintenance are crucial for ensuring smooth plant operations. It is important to seek guidance from a professional who specializes in inline valve repairs, as different factors such as operation type, size, class, and system design can impact the maintenance process.
Our Advantage:
We are a manufacturer, produce&sell ourselves
Fully support customer customized valves
MOQ：1 Piece
Accept OEM, ODM
Purchasing Valves from a Trustworthy Trunnion Ball Valve Manufacturer
It is common knowledge that various companies create different kinds of ball valves. Therefore, finding a dependable trunnion ball valve manufacturer is crucial for business owners in the manufacturing industry. There are several factors to consider when making this decision. Here are some key points to keep in mind:
Product details: The first step is to establish specific requirements that will help in selecting the right supplier. For example, understanding the type of fluids involved will help in determining the material and type of trunnion ball valves needed. Furthermore, knowing the intended applications will assist in deciding on the appropriate configuration and specifications for the ball valve.
Temperature & Pressure specifications: Providing accurate information on the minimum and maximum temperature and pressure levels is vital when selecting the right type of ball valve. This will help narrow down the list of companies that offer suitable ball valves, making the decision-making process easier. It is important to note that the material and sealing properties of the ball valve can impact its performance in the operational environment.
Cost and Volume Orders: Keep in mind that custom trunnion ball valve makers might require more time compared to those offering standard options. Keep in mind the durability when placing large orders.
Certifications: Being aware of the necessary certifications can help assess the reliability and honesty of the provider. Suppliers with certifications guarantee the basic standards needed in trunnion ball valve production at fair prices. Key certifications to look for include API 6D, API 598, NEMA, ANSI, and NSF.
Delivery Time: The time it takes to deliver the product can be crucial when selecting a supplier. While longer delivery times can have advantages, it is not ideal to wait too long when dealing with hazardous materials.
Customer Support: Lastly, it is important to know if the supplier is actively involved with customers in terms of satisfaction, specifications, needs, and feedback.
How is a Trunnion Mounted Ball Valve Constructed?
Trunnion-mounted ball valves share a resemblance with conventional ball valves. The key distinction lies in the presence of extra mechanical support for the ball or disk. In this configuration, the ball is anchored from both ends along the x-axis, ensuring stability and manageability. Let's explore the various components of a trunnion-mounted ball valve.
Body
The outer casing of a trunnion mounted ball valve, known as the body, encases and safeguards the internal mechanisms. It can be constructed from various materials like carbon steel, stainless steel, and more, chosen based on the specific usage. Metal seat ball valves and carbon steel ball valves are ideal for high-temperature environments.
Stem
The stem of a trunnion mounted ball valve links the ball to the actuator, controlling the ball's movement through welded connections. These valves are equipped with reinforced stems to prevent blowouts, enabling them to withstand extreme temperatures without damage.
Seats
The seats of a trunnion-mounted ball valve encircle the ball, ensuring a tight seal when the actuator is engaged. These valves feature spring-loaded seats that press against the ball, maintaining a secure closure.
Trunnion
What exactly is a trunnion in a valve? In a ball valve with a trunnion mount, there is an extra shaft that supports the ball from below. This shaft, called a trunnion, ensures that the ball stays securely in place. In certain ball valves, the trunnion is an extension of the ball, while in others it is connected to the ball through welded joints.
Disk
The ball in a trunnion mounted ball valve is shaped like a solid, perforated disk. One end of the ball is connected to the stem, while the other end is connected to the trunnion. In a trunnion ball valve, the ball or disk is held in position while it rotates. This design ensures that the seats are always in contact with the ball, reducing the amount of torque required.
Valve Actuator
The actuator in a trunnion ball valve is responsible for opening and closing the valve. There are various types of actuators used in ball valves, depending on the specific application and medium being used. Examples include air-operated ball valves, bare stem, gear, hand lever, pneumatic actuator, and hydraulic actuator. Additionally, gas actuators, gas-over-oil actuators, motor-operated actuators, hydraulic/electric actuators, and hydraulic-operated actuators can also be used.
How do Trunnion Mounted Ball Valves Work?
Trunnion mounted ball valves are valves that require a quarter-turn to open or close. To operate them, you simply need to turn the actuator at a 90-degree angle. When the actuator is turned, the ball inside the valve rotates to allow the medium to flow through the pipeline. Turning the handle again will move the ball to block the flow by facing the bore away from the pipeline.
For instance, if you need to control the oil flow in a critical process unit, you can use a three-piece, half-bore, split-body ball valve like the SIO Trunnion Mounted Ball Valve. To start the oil flow, you would turn the actuator on the valve 90 degrees in one direction (usually clockwise). The actuator is connected to the stem, which in turn moves the ball so that the bore faces the pipeline. Since this is a half-bore valve, the oil flow is restricted, reducing the pressure at which the oil flows.
To halt the movement of liquid, you twist the handle again, causing both the rod and the sphere to shift. The opening of the sphere now points away from the pipe, stopping the flow. The force from the liquid on the valve pushes the seals towards the sphere, creating a secure closure. The spring-loaded seals of a trunnion mounted ball valve can be pressed against the sphere even with minimal pressure. This secure closure not only stops the flow of oil, but also prevents oil from entering the inner components of the valve.
Trunnion mounted ball valves are utilized in applications with both high and low pressure. In high-pressure scenarios, the valve maintains its stability as any additional pressure on the seals and sphere is absorbed by the trunnion. In low-pressure situations, the spring-loaded seals of the valve move closer to the sphere to create a strong seal.
What are the Advantages of Using Trunnion Ball Valves?
Trunnion mounted ball valves are very popular in the piping industry. That is because they can handle different kinds of applications and mediums including liquid, gasses, and slurries. Here are some of the most favorable advantages of using trunnion mounted ball valves.
No Size Limit
Trunnion mounted ball valves can be found in all kinds of sizes. Two and three-piece ball valves can house large sized balls so they are perfect for larger applications. Single unit trunnion mounted ball valves can be used for smaller, low-pressure applications. Since they can handle high-pressure operations, trunnion mounted ball valves are also suitable for critical operations.
Customizable Features
Trunnion mounted ball valves can have many value-added features. You can fortify the seats and the ball with injections to make them seal tightly. The bearings and bolts can be made corrosion-resistant increasing the valve’s longevity. Larger valves can be equipped with lifting lugs.
Spring-Loaded Seats
The basic difference between floating ball valves and trunnion mounting ball valves is that the latter has spring-loaded seats. In a floating ball valve, the pressure of the onstream forces the ball to move towards the seats creating a seal. However, the ball needs high pressure to do so. This makes floating ball valves ineffective in low-pressure situations. In trunnion-mounted ball valves the pressure from the onstream activates the spring-loaded seats so that they move towards the ball that is held in place by the trunnion. This creates a tighter seal and makes the valve efficient in both high and low-pressure situations.
Ease of Operation
Any added pressure on the valve is absorbed by the trunnion and the stem. This means the valve needs a lower operating torque and a smaller actuator. This reduces costs and makes it easier to operate the valve. Three-piece trunnion mounted ball valves are also easy to repair, clean, replace, and maintain as you only have to remove one piece to access the working parts of the valve.
Where is Trunnion Ball Valve Used?
As already mentioned, a trunnion ball valve is versatile and can be put into many different uses. Some of its common applications are as follows:
Chemical manufacturing operations: These plants have a lot of movement of fluids. These gasses and liquids are transmitted over long distances via trunnion ball valves. They are extensively used when there are acids and strong bases, as high temperatures can damage the surrounding operators and cause danger. The trunnion ball valve’s security and sealing helps it withstand high temperature and thus prevent such situations from taking place.
Petroleum industry: Another place where trunnion ball valves are put into action is in petroleum and other fuel industries. Normally, petroleum operations choose those ball valves that adhere to API 6D standards of manufacturing and application as trunnion ball valves are sturdy enough to withstand extreme conditions during operations. Large-scale industries prefer those ball valves which can prevent leakage and withstand extreme pressures to which they are exposed.
Power industry: As power is derived from the movement of various fuels, transferring these essential fluids without leakage or wastage becomes essential for power-driven industries. Here, trunnion ball valves ensure high control over such resources, especially temperature and pressure.
What is ball valve trunnion mounted?
A trunnion-mounted ball valve includes a ball attached to a trunnion at the base. The ball valve is then connected to a stem. The main distinction between trunnion ball valves and floating ones is the minimal friction, allowing for fluid to flow smoothly with less pressure. Additionally, it requires less torque. Many industrial facilities utilize trunnion ball valves with securely welded parts.
Pros
Less torque: Trunnion mounted ball valves do not require much torque forces to operate, unlike floating ball valves that rely on torque.
Versatile: Trunnion mounted ball valves are versatile, meaning that they can be used for both small-scale domestic applications as well as large-scale manufacturing operations
No friction: Trunnion ball valves provide little to no friction and pressure on the walls, preventing compartmental depletion
Full sealing: Trunnion ball valves secure the openings fully
Cons
Expensive maintenance: As Trunnion ball valves are strongly joined together through the welding process, their maintenance and repair can be an expensive ordeal. Ball valve trunnion mounted can also be difficult to put them back together once broken. Hence, they disturb the normal manufacturing process.
Obligatory repairs: Sacrificing maintenance can decrease the quality of its working by increasing the degree of friction. As trunnion ball valves are welded together, regular maintenance is a must.
Trunnion ball valve Typical Material:
The Trunnion ball valve is accessible in forged or cast body materials (split or mono-block). Forged structures are often used for valves of high-pressure and larger bore sizes.
Typical materials for trunnion mounted ball valve design include:
1. Body/Closures: F304L, A105, A182 F304, F316, F51, F316L, F53, A350 LF2, LF3, Inconel, Monel, Hastelloy(Forging), A351 CF3, A351 CF8, A216 WCB, A351 CF3M, A351 CF8M, A890 4A/ 5A, A352 LCC/ LCB (Casting)
2. Ball: CS+ENP, F304L, F316, A182 F304, F316L, F51, CS+TCC, CS+Ni60, F53
3. Seat retainer: A182 F304, CS+ENP, F304L, F316, F51, F53, F316L, CS+Ni55, CS+TCC.
4. Stem: A182 F51, A182 F6a, A182 F316, 17-4PH,
5. Packing: RPTFE, Graphite, PTFE,
SEAT MATERIAL
PTFE: Virgin PTFE is by far the most commonly used sealing material of exceptional quality. It has attributes suitable for most services. It’s of outstanding chemical resistance across the valve and also has low friction coefficient.
RPTFE: RPTFE (known as Reinforced PTFE) is usually created by adding 15 percent of fiberglass to virgin PTFE. It has improved pressure-temperature capabilities than the virgin PTFE and comes with enhanced wear resistance. It is effective against deformation when on load.
PCTFE: PCTFE is a chlorotrifluoroethylene homopolymer with high tensile stress and have a low deformation when on load.
Nylon 6: Nylon is a rising seat material for Valves of Class 600. It is extremely robust and can be useful in oil, air, and other media. It is appropriate for strong oxidizing agents.
Devlon: Devlon is a strong molecular weight polyamide especially suited to high temperature and pressure applications in the gas and oil industry. In addition, it is a minimal moisture absorption material.
PEEK: PEEK is an advanced high-performance thermoplastic. It is really good at continuous exposure to hot water and chemicals owing to its high resistance.
PPL: PPL(Polyparaphenylene) is an exceptional seat material which has a low coefficient of friction. It can withstand extreme pressure and also temperature resistant.
TFM: TFM (modified PTFE) is an improved chemical-modified PTFE design with improved properties whilst retaining the proven benefits of conventional PTFE.
Metal: Metal (typically stellite) seats are employed in situations of hydraulic shock, flashing abrasive media, and in extreme situations.
O-RINGS MATERIAL
NBR Buna-N: NBR Buna-N (NBR) is a durable and all-purpose polymer of hard water, oil, solvent, and hydraulic fluids.
HNBR: HNBR (Hydrogenated NBR) can be compared to NBR in terms of media stability but comes with much better oxidation and heat stability.
Viton: Viton (fluorocarbon) is an elastomer of fluorocarbons that is compliant with a wide variety of chemical Substances. It produces strong performance in mineral acids, chlorinated hydrocarbons, salt solutions, and petroleum oil.
EPDM: EPDM has good resistance to abrasion and tear, with outstanding chemical resistance to a range of alkaline and acids. This is susceptible to oil, strong acids, and strong alkaline and should not be applied in compressed airlines.
FVMQ Fluorosilcione: FVMQ Fluorosilcione is a fluorinated side-chain silicone polymer chain for better oil resistance. The physical and mechanical properties closely mimic those of silicone.
Why and How to Maintain Trunnion Ball Valves?
Ensuring Trunnion ball valves are operating at their best is crucial. Proper maintenance of all valves is essential to prolong their use in installations.
Although soft seated valves provide the convenience of a quarter turn, they are only appropriate for clean services. Since most services are not entirely clean, maintenance options are necessary. For example, in the case of Trunnion ball valves, using emergency sealant injection can sometimes draw debris to the seat, causing additional damage.
Flushing is Necessary
In order to clean effectively, a flushing agent is necessary. To prevent rust and damage, moving parts must be continuously lubricated. The Trunnion mounted ball valve ensures proper control valves and fittings, including body, ventilation, drain fittings, packing injectors, and lift lines. In case of emergency, synthetic lubricants can be injected to seal leaking seats. Even the smallest amount of pollutants can affect soft seat inserts, so it is important to use flushing agents to remove grease and debris. Construction debris left in the line can contaminate soft seated valves, so it is recommended to purge the line with nitrogen before operating. Injecting sealant into the seating area can reduce valve torque by up to 40 percent, and many operators choose to keep synthetic lubricant in the seating area for this purpose.
Repairs and Spraying are Crucial
Using a spray is a recommended way to maintain a Trunnion ball valve. Neglecting to remove impurities from the valve seat can lead to an 80% increase in torque, causing issues with emergency shutdowns and valve functionality.
Regular inspections and maintenance are crucial for ensuring smooth plant operations. It is important to seek guidance from a professional who specializes in inline valve repairs, as different factors such as operation type, size, class, and system design can impact the maintenance process.
