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HY Hydraulic Actuator

Actuator HY

The Type HY Hydraulic Actuator is a ratio-piston-type actuator mounted on a reverse-acting gate valve. The HY Hydraulic Actuator is designed to be fail-safe and fail-close. When installed as part of a safety system, it will automatically close with the loss of control pressure and will open automatically when the control pressure is restored.


  • The actuators are used on secondary master valve and/or wing valve of Christmas tree, flowlines, header valves, gathering lines and pipelines.
  • As part of a surface safety system, the actuator will shut off flow from the well in the event of a catastrophic event.
  • The HY surface safety valve is a hydraulically controlled actuator that is operated by a closed hydraulic system completely independent of well fluids and pressure.
  • Hydraulic pressure acting on the piston holds the valve open. Loss of hydraulic pressure in the actuator cylinder allows the well or flowline pressure acting on the area of the lower stems to force the stem and gate closed.
  • Recommended for use in high-pressure and/or large-bore applications.


  • Control line port can be rotated 360°.
  • Hydraulic section is resistant to corrosion.
  • Has a quick-disconnect clamp.


  • In the event of a fire, the metal-to-metal seal between bonnet and lower stem acts as a secondary seal if the stem packing is damaged.
  • Has a back-seat test port and packing leak detection port.
  • Oil port can be rotated 360 degrees for easy alignment of power-source control line.
  • Has a lifting eye to facilitate removing the actuator when mounted horizontally.
  • Two bonnet types are available to cover a wide range of applications. The Type A bonnet is the extended version, and the Type B bonnet is the flush-mounted version.
  • Nipoloy process (electrolysis nickel) is used on hydraulic cylinder and piston for corrosion resistance.