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20inch 900LB Reduce Bore LF3 Trunnion Mounted Ball Valve China Factory Suppliers High Quality Fire Safe Design
Product Specification
| 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 |
Features
1. Trunnion Design
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.
2. Low Operating Torque
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.
3. Double Block and Bleed (DBB)
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.
4. Sealing Performance
The design provides better sealing performance, as the seats are spring-loaded or activated by the line pressure to maintain a tight seal.
5. Safety and Reliability
These valves are known for their high reliability and are often used in critical applications like oil and gas, petrochemical, and power industries.
6. Size and Pressure Handling
Suitable for larger diameters and high-pressure conditions, trunnion mounted ball valves can handle a wide range of pressures and temperatures.
7. Bi-Directional Operation
These valves can control the flow of fluid in both directions, providing flexibility in various piping configurations.
8. Extended Service Life
The reduced wear and tear on the seats due to the trunnion support leads to a longer service life and lower maintenance costs.
9. Emergency Sealant Injection
Many trunnion mounted ball valves have an emergency sealant injection system that allows for sealing in case of seat damage.
10. Fire-Safe Design
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.
Applications
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:
1. Oil and Gas Industry
Upstream: Used in drilling operations, production manifolds, and wellhead equipment.
Midstream: Ideal for pipeline systems, storage facilities, and compressor stations.
Downstream: Commonly found in refineries and petrochemical plants for controlling process flows.
2. Petrochemical Industry
Utilized in the transportation and processing of chemicals, where robust and reliable sealing is critical.
3. Power Generation
Used in power plants, including nuclear, thermal, and hydroelectric, to control steam, water, and other fluids in high-pressure systems.
4. Water and Wastewater Treatment
Employed in large-scale water treatment plants and distribution systems for their durability and ability to handle high pressures.
5. Marine and Offshore Applications
Suitable for subsea applications and offshore platforms where reliability under extreme conditions is essential.
6. LNG and Cryogenics
Used in liquefied natural gas (LNG) plants and cryogenic processes due to their ability to perform well at low temperatures.
7. Mining and Minerals Processing
Applied in slurry handling, ore processing, and other high-abrasion environments.
8. Pulp and Paper Industry
Used in the processing and transport of pulp and paper products, where large volumes and high pressures are common.
9. HVAC Systems
Utilized in heating, ventilation, and air conditioning systems for large buildings and industrial complexes.
10. Industrial Manufacturing
Used in various manufacturing processes where reliable fluid control is necessary.
11. Chemical Processing
Employed in the handling of corrosive and hazardous chemicals where high integrity and reliability are needed.
12. Fire Safety Systems
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.
Technical Drawing
Frequently Asked Questions
What are the core design and test standards for this trunnion mounted ball valve?
This valve is designed according to the API6D standard, with Face-to-Face (FTF) dimensions matching ASME B16.10, and flange dimensions conforming to ASME B16.5. It is tested in compliance with the API598 standard.
What is the body material and pressure rating of this valve?
The valve body is constructed from LF3 (low-temperature carbon steel), making it suitable for low-temperature applications. It carries a high pressure rating of 900LB.
What is Double Block and Bleed (DBB) capability?
Double Block and Bleed allows the valve to isolate both the upstream and downstream sides at the same time. This feature makes it possible to bleed off excess pressure or fluid from the body cavity between the seats, enhancing safety during maintenance.
How does the trunnion design reduce operating torque?
In a trunnion design, the ball is anchored at the top and bottom by a shaft or pin. This structural support absorbs the load from line pressure, preventing the ball from shifting into the downstream seat and significantly reducing operating friction and torque.
What is the purpose of the emergency sealant injection system?
The emergency sealant injection system allows operators to inject specialized sealant directly into the seat area. This provides a temporary seal and prevents leakage in the event that the primary valve seats become damaged.