Pentair / Keystone Pneumatic Actuators MRP/MRA

Compact, reliable and economical powered operation for quarter-turn valves

There are many different variations available to fit your specific needs. Please Contact Us for a free quote or consultation.

Keystone Pneumatic Actuators MRP/MRA


  • Direct mounting to all Keystone butterfly valves.
  • Double rack & pinion design nullifies sideloads on the pinion shaft, minimizing bearing wear and extending life.
  • Double acting or spring return models utilize the same compact body design.
  • Aluminum body, hard anodized externally and internally, for corrosion and wear resistance.
  • Electrostatic powder coating (ESPC) finish, external on body, internal and external on end caps, protects against corrosive environments.
  • Adjustable travel stops.
  • Safe end cover bolting requiring no special tools.
  • Anti-blowout drive pinion.
  • Over travel adjustment (at each end) +5°.
  • Under travel adjustment (at each end) -10°.
  • Easy field conversion between DA and SR models
  • Specs

    Technical data

    Torque output range:
    Double acting 204 - 22902 lbs in
    Spring return 69 - 10155 lbs in
    Operating medium:
    Air (dry or lubricated)
    Travel adjustment:
    Over travel (at each end) +5°
    Under travel (at each end) -10°
    Increased under travel is available, on request.
    Temperature range: -20°F to 210°F
    Air supply pressure: 120 psi maximum


    Operating & Safety Instructions
    Pneumatic Actuators Rack & Pinion Series PED O&SI

    Technical Data Sheets
    Keystone MRP and MRA Pneumatic Actuators

    Keystone Product Brochure Keystone Case Studies
    Keystone Document Library Pentair Press Releases