WedgeRock RP: Planetary Gear Actuator

Planetary Gear Solutions

While the WedgeRock Planetary Gear may look unconventional, you are not likely to find a more efficient, self-locking gear operator on the market. The sliding action of conventional worm gear valve operators typically lose more than 65% of the input torque to friction resulting in heat and wear; inherent in the self-locking function, conventional worm gear operators are less than 35% efficient.

In contrast, WedgeRock Planetary Gears provide a rolling action with numerous teeth always in contact and self-centering gear carriages that evenly distribute contact stress resulting in higher efficiencies and an extended, more predictable cycle life – typically providing efficiencies greater than 90%.

Manual or motorized applications, WedgeRock has a planetary gear design for every application. From quarter turn to multi-turn, rising stem thrust applications, subsea or topside, WedgeRock can provide a robust, compact and efficient planetary operator for your application.

WedgeRock RP: Planetary Gear Actuator


  • Compact
  • Efficient drive train
  • Patent pending self-locking technology (Optional)
  • Modular design accommodates multiple applications
    • Quarter Turn
    • Multi-turn
    • Rising stem
  • Input shaft projection parallel (RP) or perpendicular (RBP) to output
  • Motorized and manual input options
  • Splined drive sleeve (Optional)
  • Travel indication
  • Great for subsea applications (RPs)
  • Application engineered
WedgeRock RP Planetary Gear Actuator


Standard Gears Include

  • Ductile Iron Housings (Carbon Steel if fabricated).
  • Standard Temperature Range: -40° to 225°F.
    • Seal: -40 to 225° F (BUNA)
    • Grease : -40 to 400°F long term exposure
  • Machined for direct mount without adaption.
  • Designed for Ingress Protection Rating: IP68
  • Pressure relief valves in the housing and stem, relieves pressure build caused by temperature changes. (For effective venting Gear Orientation must be provided for proper relief valve positioning.)

Additional Options Available

  • Low Temp. -50°F
    • Seal: Low Temp. to -50°F (Nitrile)
    • Grease: Low Temp. to -50°F
    • Housing and Other Materials of Construction capable of -50°F
  • High Temp. -15° to 400°F
    • Seal: -15 to 400°F (Viton)
    • Grease : -40 to 400°F long term exposure
  • Risers and Adaptors
  • Lockouts
  • Arrestor Brackets (Supports the use of a Portable Torque Tool.)

Additional Configuration Available

  • Buy America Compliant
  • AWWA Compliant (Standard and in 316 SS)
  • Declutchable and Lost Motion Overrides (For use with hydraulic and pneumatic actuators.)
  • Configurable Sub Sea Compliant options

Options and Configurations are not limited to the above, please make request for special applications and specification requirements.


WedgeRock RP (Planetary) & RBP (Bevel/Planetary)

Manual or motorizable operator for quarter, multi-turn, & thrust applications.

The WedgeRock RP allows for modular configurations. If a parallel input vs output is required, only planetary ratios need to be selected. If a perpendicular input vs output is required, or if the RP is being used in a rising stem application, a bevel must be selected. Each frame size can support up to two ratios. When the max ratio of one frame size is exceeded, another RP is sized and mounted in series to add ratio as required.

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