Shafer L-Series Linear Valve Actuator

For operation of rising stem type valves

Product Features

  • Hydraulic piston generates dependable and efficient thrust which acts directly on the valve stem
  • Smooth linear motion, even at rapid operating speeds
  • Actuator is mounted directly on the valve
  • Piston threaded directly to the valve stem for installation on new or in-service valves
  • Actuator absorbs all end-of-stroke thrust to protect the valve
  • Operating speed is easily controlled
  • Actuator is hydraulically locked in position


  • Double acting or spring return operation
  • Thrust output range 900 to 600,000 lbs. (408 to 272,155 kg)
  • Linear motion range to 72 inches (182.9 cm)
  • Power supply pressure range 50 to 3,000 psi (3.4 to 207 bars)
    • Hydraulic, gas/hydraulic, pneumatic
  • Ambient temperature range:
    • -20°F to 250°F (-29°C to 121°C) Standard
    • -50°F to 250°F (-45°C to 121°C) Optional


  • Gate valve applications on natural gas pipelines
  • Gate valve applications on crude oil or products pipelines
  • Rising stem ball valves
  • Spring return or fail-safe applications
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