Pressure Seal Parallel Disc Gate Valves

 

Design Features & Benefits


  1. Self-aligning interchangeable discs
  2. Lower torque may allow smaller actuator
  3. Yoke facilitates easy maintenance and actuator mounting

 

Pressure Seal Parallel Disc Gate Valves - Design Features and Benefits

 

Parallel Seat Gate Valve

Parallel seat gate and seat ring construction can be furnished for high differential pressure services or where high piping loads or thermal expansion may cause sticking of a wedge type gate. The parallel seat gate assembly consists of two interchangeable spring loaded discs, a fully guided disc carrier, and retaining pins.
Position seating eliminates stress and potential binding due to thermal expansion of the stem. Spring loaded discs help maintain contact between the discs and seat rings during initial sealing and eliminate vibration.
Discs are interchangeable which simplifies in-line maintenance and eliminates the need to custom fit the seats to the discs.
Internal stops provide positive over travel protection for power actuated valves and act as a reference to position the discs in the open and closed positions. This design features low seating torque which reduces actuator size and cost. Hardfaced seating surfaces provide high cycle capability in very high differential pressure services.

 

Features

  • Self aligning interchangeable discs
  • No wedging force; disc reacts freely to thermal changes
  • Uniform seat wear
  • Positive disc travel stops cast into body
  • Lower torque may allow smaller actuator
  • Ease of maintenance
    Position seated for closure
Pressure Seal Parallel Disc Gate Valves - Design Features and Benefits - Feature

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