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Trunnion mounted ball valve for reliable flow control in industrial piping systems.
Floating Ball Valve
Trunnion Mounted Ball Valve - Image 1

Trunnion Mounted Ball Valve

Qisheng’s High-Performance Trunnion Mounted Ball Valves are engineered for large-diameter and high-pressure pipeline services. Featuring a robust fixed-ball design with spring-energized seats, these valves ensure reliable bi-directional sealing even at low pressure differentials. Built with an anti-blowout stem, anti-static devices, and fire-safe construction to API 6FA/607 standards, they provide maximum safety for oil and gas transmission. The integrated DBB functionality and emergency sealant injection system make them a premier choice for critical infrastructure.

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Description

Qisheng High-Performance Trunnion Mounted Ball Valve

The Qisheng Trunnion Mounted Ball Valve is a heavy-duty, reliable flow control solution designed specifically for large-scale energy infrastructure and high-pressure transmission pipelines. Unlike floating valves, the ball is fixed by a trunnion and stem, allowing the seats to float and provide a superior, pressure-assisted seal. This design significantly reduces operating torque and enhances sealing integrity across a wide range of pressures and temperatures.

Core Engineering Advantages

  • Double Block and Bleed (DBB): Provides simultaneous upstream and downstream sealing, allowing the body cavity to be vented or drained while the valve is in the closed position.
  • Fire-Safe Design: Engineered with secondary metal-to-metal seals that energize in the event of fire, fully certified to API 6FA and API 607 standards.
  • Emergency Sealant Injection: Equipped with sealant injection fittings on the stem and seat to provide an emergency secondary seal in case of damage or leakage.
  • Anti-Static & Anti-Blowout: Features a standard anti-static device ensuring electrical continuity and a forged-bottom stem design that prevents blowouts under extreme internal pressure.
  • Low Operating Torque: The trunnion-mounted design minimizes friction between the ball and seats, allowing for more efficient actuation and smaller actuator sizing.

Technical Specifications

  • Design Standards: API 6D, ASME B16.34
  • Seating: Soft Seated or Metal-to-Metal Seated for abrasive media
  • Pressure Ratings: ASME Class 150 to Class 2500
  • Features: Vent/Drain valves, Anti-static device, DIB-1/DIB-2 optional seat designs
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