We are the proud supplier of Perar, Starline, and Pekos trunnion mounted ball valves. Even down to the body bolts which are 3.1 certified, our valves are Fully Western European. We also keep stocks that comply with many National and International Standards, including NORSOK, National Grid V6, and Lloyds Type Approval. In addition to being approved by many end-user customers.
Trunnion Mounted Ball Valves
Suitable for all industries
- Low pressure drops
- Larger pipelines and higher-pressure ratings
- Multiple sealing arrangements for client needs
| |
| Size Range | 2” – 24” |
| Pressure Class | ANSI 150#, 2” – 24” |
| ANSI 300#, 2” – 18” GIS/V6 (National Grid) Qualification | |
| ANSI 600#, 2” – 24” GIS/V6 (National Grid) Qualification | |
| ANSI 900#, 2” – 20” | |
| ANSI 1500#, 2” – 12” | |
| ANSI 2500#, 2” – 8” | |
| Materials | Forged Low Temp Carbon Steel A350 LF2 |
| Trim | St. Steel F316, Duplex F51, LF2+E.N.P (All stems F51) |
| Construction | Full Bore & Reduced Bore, bolted body construction |
| Design | Full Trunnion Mounted, Double Block & Bleed |
| Seats | Inserts RPTFE / DEVLON / PEEK |
| Certification | NACE, PED CE/CA, ATEX, Firesafe Certified, API Monogram |
| Features | LT AED O-Rings, ISO Top flange, Emergency Sealant Injection (300# & 600#) |
| European Origin Materials |
| |
| Size Range | ½” – 4” |
| Pressure Class | ANSI 150# |
| ANSI 300# | |
| ANSI 600# | |
| ANSI 800# | |
| Materials | A105 / LF2 / F316/L / Duplex F51-F5 |
| Trim | St. Steel F316 and Exotic |
| Construction | Full Bore & Reduced Bore, Bolted Body Construction |
| Design | Full Trunnion Mounted, Double Block & Bleed |
| Seat Inserts | Virgin PTFE / RPTFE / Devlon / Peek |
| Certification | NACE, PED CE/CA, ATEX, Firesafe Certified, API Monogram |
| Features | LT AED O-Rings, ISO Top flange, Emergency Sealant Injection (300# & 600#), European Origin Materials |
| Bespoke | Starline’s unique product interchangeability allows for easy changes of end connections, trim, seats, seals & bolting. We keep an extensive stock holding of component parts, we keep over 25 different O-Ring materials in stock, this enables us to provide the exact specification required. Full workshop & test facilities enables fast track changes. |
| |
| Size Range | ½” – 16” |
| Pressure Class | ANSI 150#, 2” – 24” |
| ANSI 300#, 2” – 18” | |
| ANSI 600#, 1” – 8” | |
| Materials | WCC / LCC / CF8M / Bronze AB2 |
| Trim | St. Steel F316 and Exotic |
| Construction | Full Bore bolted, Reduced Bore end entry |
| Design | Floating Ball, Guided Ball and Full Trunnion Mounted. |
| Seat Inserts | PTFE / RPTFE / TFM |
| Certification | NACE, PED CE/CA, ATEX, Ta Luft, Lloyds Firesafe & Type Approval |
| Features | LT AED O-Rings, ISO Top flange, Emergency Sealant Injection (300# & 600#), European Origin Materials |
The valve design incorporates a trunnion at the top and bottom of the ball. This ensures that the ball can only rotate from open to close and vice versa, and not in the direction of the pipe flow. It will also maintain a proper seal on both sides with no requirement for added torque to the stem.
This enables them to be used for larger applications, and/or high-pressure environments. This is due to the unobstructed flow path through the valve and relative ease of operation. They have become an essential component in large piping systems around the world.
What Is A Trunnion Mounted Ball Valve?
A trunnion mounted ball valve is a quarter-turn valve used to control or isolate the flow of fluids or gases. The ball is supported at the top and bottom rotating between two seats. Differential pressure forces the seat rings against the ball making a seal, whilst, at low or no differential pressure, springs behind the seats ensure sealing. Trunnion mounted ball valves are a good solution for larger sizes and higher pressures and also for very low-pressure and fluctuating-pressure applications. Benefits include lower operating torques which are crucial for metal seated valves on high temperature and abrasive applications.
Floating ball valves differ in that the seats support the ball which is allowed to move or float between the two seats with pressure. A floating Ball is normally used for small sizes and lower pressures. The valve is designed to seal against the downstream seat only as the ball moves from the upstream side.
It’s important to understand that trunnion mounted ball valves are generally more complex than floating ball valves with many more components, it is therefore usually more expensive. In small sizes it’s possible to use either trunnion mounted or floating ball designs, so it is therefore essential to understand the specific performance and sealing characteristics required for the given application when making a selection.
Get In Touch For A Quote
Key Benefits:
- Reliable, quality products
- Fast responses on quotes
- Large stock holding
- Expert advice
- Competitive lead times
- Brilliant aftercare service
Frequently Asked Questions
A trunnion mounted ball valve is a type of quarter-turn valve that uses a trunnion to support the ball at the top and bottom. The trunnion is a stationary shaft that allows the ball to rotate without causing excessive friction between the ball and the seats. This design is often used in high-pressure or high-temperature applications, where a floating ball valve may not provide adequate sealing or durability.
Durability: Trunnion mounted ball valves are designed to handle high-pressure and high-temperature applications, making them suitable for use in demanding industrial environments.
Tight sealing: The trunnion design allows for tight sealing around the ball, reducing the risk of leakage and ensuring optimal performance.
Low operating torque: Trunnion mounted ball valves require less operating torque than other types of valves, making them easier to open and close.
Wide range of applications: Trunnion mounted ball valves can be used in a wide range of applications, including oil and gas, petrochemical, power generation, and water treatment.
Trunnion mounted ball valves can be made from a variety of materials, depending on the specific application. Common materials include carbon steel, stainless steel, and high-performance alloys such as Inconel and Hastelloy. The ball and seat materials are often selected based on the fluid being transported and the temperature and pressure conditions of the application.
There are several types of trunnion mounted ball valves, including full bore, reduced bore, top-entry, and split-body. Full bore valves have a larger ball and hole, allowing for less restriction of flow. Reduced bore valves have a smaller ball and hole, causing more restriction of flow. Top-entry valves have a removable bonnet, allowing for easier maintenance and repair. Split-body valves have a two-piece body, allowing for easier installation and maintenance.
The main difference between a single-piece and a two-piece body trunnion mounted ball valve is the number of pieces that make up the valve body. A single-piece body valve has one solid body, while a two-piece body valve has two separate pieces that are bolted together. Two-piece body valves are easier to install and maintain, as the body can be separated for access to the ball and seat. However, single-piece body valves are typically stronger but can be more difficult to maintain.
Yes, trunnion mounted ball valves can be automated with electric or pneumatic actuators. Automation allows for remote operation and control of the valve, making it easier to adjust flow rates or shut off the valve in emergency situations. Valve automation can also improve efficiency and reduce the risk of operator error.
Trunnion mounted ball valves undergo rigorous testing to ensure quality and performance. This includes hydrostatic testing to verify the valve body's strength and pressure resistance, seat and seal testing to verify tightness and leakage prevention, and torque testing to verify the actuator's efficiency and functionality. The valves are also subjected to performance testing to verify the flow rate, operating torque, and other functional parameters.
The selection of the right trunnion mounted ball valve depends on several factors, such as the pressure rating, temperature range, fluid type, and flow rate of the application. Other factors to consider include the valve size, connection type, and end connections. Consulting with a valve manufacturer or supplier can help ensure that the right valve is selected for the specific application.
A trunnion mounted ball valve uses a ball with a hole in the center that rotates 90 degrees to allow or prevent flow through the valve. When the valve is open, the ball is rotated so that the hole is aligned with the valve body's flow path, allowing fluid to pass through. When the valve is closed, the ball is rotated 90 degrees so that the hole is perpendicular to the flow path, preventing fluid from passing through. The trunnion supports the ball and allows it to rotate smoothly without causing excessive wear or leakage.
Trunnion mounted ball valves are available in a wide range of sizes and pressure ratings, depending on the specific application. Common sizes range from 2 inches to 48 inches in diameter, with pressure ratings ranging from class #150 to #2500 However, larger sizes and higher pressure ratings are also available for specialised applications.
Trunnion mounted ball valves are typically installed between two flanges using bolts and gaskets to provide a tight seal. They should be installed according to the manufacturer's instructions and in accordance with industry standards. Routine maintenance should be performed according to a set schedule, including inspections, lubrication, and replacement of any worn or damaged parts. It is important to follow proper maintenance procedures to ensure optimal valve performance and reliability.
The main difference between a floating ball valve and a trunnion mounted ball valve is the way the ball is supported. In a floating ball valve, the ball is not fixed in place and is free to move within the valve body. The ball relies on the pressure of the fluid to create a seal against the valve seats. In a trunnion mounted ball valve, the ball is supported by a stationary shaft, known as the trunnion. The trunnion allows the ball to rotate smoothly and provides a secure seal against the valve seats.
The main difference between soft-seated and metal-seated trunnion mounted ball valves is the material used for the valve seats. Soft-seated valves have seats made from materials such as PTFE or elastomers, which provide a tight seal and are suitable for use with low-pressure and low-temperature applications. Metal-seated valves have seats made from materials which provide a durable seal and are suitable for use with high-pressure and high-temperature applications.
Trunnion mounted ball valves are commonly used in applications where high pressure, high temperature, or abrasive fluids are present. Some common applications include oil and gas pipelines, chemical processing plants, water treatment facilities, and power generation plants. Trunnion mounted ball valves are also used in marine and offshore applications, where reliability and durability are critical.
The lifespan of a trunnion mounted ball valve depends on several factors, such as the application, frequency of use, and maintenance practices. Generally, trunnion mounted ball valves are designed to last for many years, with a lifespan of up to 20-30 years or more in some cases.
We are the proud supplier of Perar, Starline, and Pekos trunnion-mounted ball valves. Even down to the body bolts which are 3.1 certified, our valves are Fully Western European. We also keep stocks that comply with many National and International Standards, including NORSOK, National Grid V6, and Lloyds Type Approval. In addition to being approved by many end-user customers.
The valve design incorporates a trunnion at the top and bottom of the ball. This ensures that the ball can only rotate from open to close and vice versa, and not in the direction of the pipe flow. It will also maintain a proper seal on both sides with no requirement for added torque to the stem.
This enables them to be used for larger applications, and/or high-pressure environments. This is due to the unobstructed flow path through the valve and relative ease of operation. They have become an essential component in large piping systems around the world.
|
| |
| Size Range | 2” – 24” |
| Pressure Class | ANSI 150#, 2” – 24” |
| ANSI 300#, 2” – 18” GIS/V6 (National Grid) Qualification | |
| ANSI 600#, 2” – 24” GIS/V6 (National Grid) Qualification | |
| ANSI 900#, 2” – 20” | |
| ANSI 1500#, 2” – 12” | |
| ANSI 2500#, 2” – 8” | |
| Materials | Forged Low Temp Carbon Steel A350 LF2 |
| Trim | St. Steel F316, Duplex F51, LF2+E.N.P (All stems F51) |
| Construction | Full Bore & Reduced Bore, bolted body construction |
| Design | Full Trunnion Mounted, Double Block & Bleed |
| Seats | Inserts RPTFE / DEVLON / PEEK |
| Certification | NACE, PED CE/CA, ATEX, Firesafe Certified, API Monogram |
| Features | LT AED O-Rings, ISO Top flange, Emergency Sealant Injection (300# & 600#) |
| European Origin Materials |
|
| |
| Size Range | ½” – 4” |
| Pressure Class | ANSI 150# |
| ANSI 300# | |
| ANSI 600# | |
| ANSI 800# | |
| Materials | A105 / LF2 / F316/L / Duplex F51-F5 |
| Trim | St. Steel F316 and Exotic |
| Construction | Full Bore & Reduced Bore, Bolted Body Construction |
| Design | Full Trunnion Mounted, Double Block & Bleed |
| Seat Inserts | Virgin PTFE / RPTFE / Devlon / Peek |
| Certification | NACE, PED CE/CA, ATEX, Firesafe Certified, API Monogram |
| Features | LT AED O-Rings, ISO Top flange, Emergency Sealant Injection (300# & 600#), European Origin Materials |
| Bespoke | Starline’s unique product interchangeability allows for easy changes of end connections, trim, seats, seals & bolting. We keep an extensive stock holding of component parts, we keep over 25 different O-Ring materials in stock, this enables us to provide the exact specification required. Full workshop & test facilities enables fast track changes. |
|
| |
| Size Range | ½” – 16” |
| Pressure Class | ANSI 150#, 2” – 24” |
| ANSI 300#, 2” – 18” | |
| ANSI 600#, 1” – 8” | |
| Materials | WCC / LCC / CF8M / Bronze AB2 |
| Trim | St. Steel F316 and Exotic |
| Construction | Full Bore bolted, Reduced Bore end entry |
| Design | Floating Ball, Guided Ball and Full Trunnion Mounted. |
| Seat Inserts | PTFE / RPTFE / TFM |
| Certification | NACE, PED CE/CA, ATEX, Ta Luft, Lloyds Firesafe & Type Approval |
| Features | LT AED O-Rings, ISO Top flange, Emergency Sealant Injection (300# & 600#), European Origin Materials |
What Is A Trunnion Mounted Ball Valve?
A trunnion mounted ball valve is a quarter-turn valve used to control or isolate the flow of fluids or gases. The ball is supported at the top and bottom rotating between two seats. Differential pressure forces the seat rings against the ball making a seal, whilst, at low or no differential pressure, springs behind the seats ensure sealing. Trunnion mounted ball valves are a good solution for larger sizes and higher pressures and also for very low-pressure and fluctuating-pressure applications. Benefits include lower operating torques which are crucial for metal seated valves on high temperature and abrasive applications.
Floating Ball valves differ in that the seats support the ball which is allowed to move or float between the two seats with pressure. A floating Ball is normally used for small sizes and lower pressures. The valve is designed to seal against the downstream seat only as the ball moves from the upstream side.
It’s important to understand that trunnion mounted ball valves are generally more complex than floating ball valves with many more components, it is therefore usually more expensive. In small sizes it’s possible to use either trunnion mounted or floating ball designs, so it is therefore essential to understand the specific performance and sealing characteristics required for the given application when making a selection.
Frequently Asked Questions
A trunnion mounted ball valve is a type of quarter-turn valve that uses a trunnion to support the ball at the top and bottom. The trunnion is a stationary shaft that allows the ball to rotate without causing excessive friction between the ball and the seats. This design is often used in high-pressure or high-temperature applications, where a floating ball valve may not provide adequate sealing or durability.
A trunnion mounted ball valve uses a ball with a hole in the center that rotates 90 degrees to allow or prevent flow through the valve. When the valve is open, the ball is rotated so that the hole is aligned with the valve body's flow path, allowing fluid to pass through. When the valve is closed, the ball is rotated 90 degrees so that the hole is perpendicular to the flow path, preventing fluid from passing through. The trunnion supports the ball and allows it to rotate smoothly without causing excessive wear or leakage.
Durability: Trunnion mounted ball valves are designed to handle high-pressure and high-temperature applications, making them suitable for use in demanding industrial environments.
Tight sealing: The trunnion design allows for tight sealing around the ball, reducing the risk of leakage and ensuring optimal performance.
Low operating torque: Trunnion mounted ball valves require less operating torque than other types of valves, making them easier to open and close.
Wide range of applications: Trunnion mounted ball valves can be used in a wide range of applications, including oil and gas, petrochemical, power generation, and water treatment.
Trunnion mounted ball valves are available in a wide range of sizes and pressure ratings, depending on the specific application. Common sizes range from 2 inches to 48 inches in diameter, with pressure ratings ranging from class #150 to #2500 However, larger sizes and higher pressure ratings are also available for specialised applications.
Trunnion mounted ball valves can be made from a variety of materials, depending on the specific application. Common materials include carbon steel, stainless steel, and high-performance alloys such as Inconel and Hastelloy. The ball and seat materials are often selected based on the fluid being transported and the temperature and pressure conditions of the application.
Trunnion mounted ball valves are typically installed between two flanges using bolts and gaskets to provide a tight seal. They should be installed according to the manufacturer's instructions and in accordance with industry standards. Routine maintenance should be performed according to a set schedule, including inspections, lubrication, and replacement of any worn or damaged parts. It is important to follow proper maintenance procedures to ensure optimal valve performance and reliability.
There are several types of trunnion mounted ball valves, including full bore, reduced bore, top-entry, and split-body. Full bore valves have a larger ball and hole, allowing for less restriction of flow. Reduced bore valves have a smaller ball and hole, causing more restriction of flow. Top-entry valves have a removable bonnet, allowing for easier maintenance and repair. Split-body valves have a two-piece body, allowing for easier installation and maintenance.
The main difference between a floating ball valve and a trunnion mounted ball valve is the way the ball is supported. In a floating ball valve, the ball is not fixed in place and is free to move within the valve body. The ball relies on the pressure of the fluid to create a seal against the valve seats. In a trunnion mounted ball valve, the ball is supported by a stationary shaft, known as the trunnion. The trunnion allows the ball to rotate smoothly and provides a secure seal against the valve seats.
The main difference between a single-piece and a two-piece body trunnion mounted ball valve is the number of pieces that make up the valve body. A single-piece body valve has one solid body, while a two-piece body valve has two separate pieces that are bolted together. Two-piece body valves are easier to install and maintain, as the body can be separated for access to the ball and seat. However, single-piece body valves are typically stronger but can be more difficult to maintain.
The main difference between soft-seated and metal-seated trunnion mounted ball valves is the material used for the valve seats. Soft-seated valves have seats made from materials such as PTFE or elastomers, which provide a tight seal and are suitable for use with low-pressure and low-temperature applications. Metal-seated valves have seats made from materials which provide a durable seal and are suitable for use with high-pressure and high-temperature applications.
Yes, trunnion mounted ball valves can be automated with electric or pneumatic actuators. Automation allows for remote operation and control of the valve, making it easier to adjust flow rates or shut off the valve in emergency situations. Valve automation can also improve efficiency and reduce the risk of operator error.
Trunnion mounted ball valves are commonly used in applications where high pressure, high temperature, or abrasive fluids are present. Some common applications include oil and gas pipelines, chemical processing plants, water treatment facilities, and power generation plants. Trunnion mounted ball valves are also used in marine and offshore applications, where reliability and durability are critical.
Trunnion mounted ball valves undergo rigorous testing to ensure quality and performance. This includes hydrostatic testing to verify the valve body's strength and pressure resistance, seat and seal testing to verify tightness and leakage prevention, and torque testing to verify the actuator's efficiency and functionality. The valves are also subjected to performance testing to verify the flow rate, operating torque, and other functional parameters.
The lifespan of a trunnion mounted ball valve depends on several factors, such as the application, frequency of use, and maintenance practices. Generally, trunnion mounted ball valves are designed to last for many years, with a lifespan of up to 20-30 years or more in some cases.
The selection of the right trunnion mounted ball valve depends on several factors, such as the pressure rating, temperature range, fluid type, and flow rate of the application. Other factors to consider include the valve size, connection type, and end connections. Consulting with a valve manufacturer or supplier can help ensure that the right valve is selected for the specific application.
Get In Touch For A Quote