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Ball Valves - Trunion Ball Valves

Seat Sealing

Soft seats are standard. Seat inserts of synthetic material such as Nylon, PTFE, RTFE or Peek are contained within a metal seat ring. With no or very low line pressure, sealing between the seats and ball is achieved by seat springs. With higher line pressure, the line pressure in conjunction with the spring load, forces the upstream seat ring against the ball, which results in tighter sealing 0-ring seat insert design is available.

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Self Relieving Seat

This standard feature is designed to prevent excessive pressure build up within the valve by automatic alloy relieving pressure when body cavity pressure exceeds the spring load on the seats Double Piston Seat is also available as an option.

Sealant Inject Fitting

This feature is standard except in sizes 2"-4" for pressure classes 150,300and 500, In case of seat ring damage, sealant injection provides a fast, reliable way to restore tight sealing, This injection system can also be used for routine flushing of the seat ring area while in service.

Double Seals at all joints

All connecting parts employ a double sealing design incorporating a spiral wound 316ssigraphite gasket and o-ring to ensure positive sealing. Delta ring is used optionally for class1500-2500.

Stem Sealing & Sealant Injection Fitting

Two o-rings and graphite packing are used for pressure classes 150through 600. One each of lip seal and O-ring plus graphite packing are used for pressure classes 900 through2500, In case of damage to the O-ring lip seal, sealant injection stops leaking and restores tight sealing.

Seat Ring

All connecting parts employ a double sealing design incorporating a spiral wound 316ss graphite gasket and o-ring to ensure positive sealing. Delta ring is used optionally for class1500-2500 Metal seat: Hard-faced metal seat combines belleville spring to assure the valve close tightness. Valve close tightness: Resilient Seat ANSI B16.104 VI, Metal Seat ANSI B16.104 V, VI optional.

Actuation

SFC Trunion ball valves are designed to easily install a variety of actuators including pneumatic, hydraulic, electric actuators, electro-mechanical, electro-hydraulic, etc.

Double Block and Bleed

SFC Trunion ball valves provide a positive seal at both upstream and downstream independently, Since pressure on each side of the ball is blocked from the body cavity, a pressure releasing device can be used by an operator to check the integrity of the upstream and downstream seats

Low Friction Stem/Trunion Bearings and Thrust WR sheers

Heavy duty PTFE lined carbon or stainless steel bearing and thrust washers ensure durable and low torque operation.

Other Features

  • • Anti Static Device for Grounding
  • • ISO5211 Mounting pad and Adaptability for all types of Actuator mounting
  • • Blow-Out Proof Stem
  • • Stem extension pieces or pups

Production Range

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Design Standards

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Standard Material Specifications

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Technical Specifications Download