20 Inch 900LB Reduce Bore LF3 Trunnion Mounted Ball Valve - Premium China Suppliers & Factory Quality
| Type | Trunnion Mounted Ball Valve |
| Size | 20”*18“ |
| Pressure | 900LB |
| Connection | Flange End |
| Operation | Gear Box |
| Body Material | LF3 |
| Design Standard | API6D |
| FTF Dimension Standard | ASME B16.10 |
| Flange Dimension Standard | ASME B16.5 |
| Test Standard | API598 |
| Application | W.O.G |
The ball is fixed in place by a trunnion (a shaft or pin) at the top and bottom, which reduces the load on the valve seats and ensures stable operation.
The trunnion design reduces the friction between the ball and the seats, requiring less force to operate the valve. This is especially beneficial in high-pressure applications.
Trunnion mounted ball valves can isolate both upstream and downstream sides of the valve simultaneously, allowing for the bleeding of pressure or fluid from the cavity between the seats.
The design provides better sealing performance, as the seats are spring-loaded or activated by the line pressure to maintain a tight seal.
These valves are known for their high reliability and are often used in critical applications like oil and gas, petrochemical, and power industries.
Suitable for larger diameters and high-pressure conditions, trunnion mounted ball valves can handle a wide range of pressures and temperatures.
These valves can control the flow of fluid in both directions, providing flexibility in various piping configurations.
The reduced wear and tear on the seats due to the trunnion support leads to a longer service life and lower maintenance costs.
Many trunnion mounted ball valves have an emergency sealant injection system that allows for sealing in case of seat damage.
Many trunnion mounted ball valves are designed to be fire-safe, ensuring operation even under fire conditions to prevent leakage and maintain control.
These features make trunnion mounted ball valves a preferred choice for demanding applications where durability, reliability, and performance are critical.
Trunnion mounted ball valves are used in a wide range of applications, especially where high pressure, large diameter, and reliable sealing are required. Here are some of the primary applications:
Upstream: Drilling operations, production manifolds, and wellhead equipment.
Midstream: Pipeline systems, storage facilities, and compressor stations.
Downstream: Refineries and petrochemical plants for controlling process flows.
Utilized in the transportation and processing of chemicals, where robust and reliable sealing is critical.
Used in power plants, including nuclear, thermal, and hydroelectric, to control steam, water, and other fluids in high-pressure systems.
Employed in large-scale water treatment plants and distribution systems for their durability and ability to handle high pressures.
Suitable for subsea applications and offshore platforms where reliability under extreme conditions is essential.
Used in liquefied natural gas (LNG) plants and cryogenic processes due to their ability to perform well at low temperatures.
Applied in slurry handling, ore processing, and other high-abrasion environments.
Used in the processing and transport of pulp and paper products, where large volumes and high pressures are common.
Utilized in heating, ventilation, and air conditioning systems for large buildings and industrial complexes.
Used in various manufacturing processes where reliable fluid control is necessary.
Employed in the handling of corrosive and hazardous chemicals where high integrity and reliability are needed.
Often integrated into fire suppression systems, especially in industrial settings, due to their fire-safe design.
These applications highlight the versatility and reliability of trunnion mounted ball valves in various high-pressure and critical service environments.
Q1: What is a Trunnion Mounted Ball Valve?
A: Unlike floating ball valves, a trunnion mounted ball valve has the ball anchored at the top and bottom by a trunnion. This design holds the ball firmly in place, reducing the load on the valve seats and making it ideal for high-pressure, large-diameter applications.
Q2: What are the benefits of a Double Block and Bleed (DBB) design?
A: The DBB capability allows the valve to seal upstream and downstream ports simultaneously. This isolates the main piping system and allows users to vent or bleed fluid from the body cavity, ensuring safety during maintenance.
Q3: Why is LF3 body material used in these valves?
A: LF3 (ASTM A350 LF3) is a low-alloy carbon steel designed specifically for low-temperature service. It provides excellent impact toughness and reliability in cryogenic and cold-climate applications down to -150°F (-101°C).
Q4: What standards apply to this 20”*18“ 900LB Ball Valve?
A: This valve is designed according to API 6D standards, with face-to-face dimensions complying with ASME B16.10, flanges complying with ASME B16.5, and testing standards based on API 598 to guarantee performance and safety.
Q5: How does the emergency sealant injection system work?
A: In the event of seat damage or wear leading to leakage, an emergency sealant can be injected through special fittings directly to the seat area. This temporarily restores the sealing integrity until scheduled maintenance can be performed.
Q6: What is a fire-safe design in ball valves?
A: A fire-safe design ensures that even if the primary soft seat seals melt or are destroyed in a fire, secondary metal-to-metal seals will engage to prevent external leakage and control the flow of hazardous media.