• 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.

• Specifications

Technical Data
Torque output range:
Double Acting 238 - 18180 lbs in
Spring Return 132 - 12515 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

Mounting Specifications Actuator to valve: Keystone standard Accessories: NAMUR VDI/VDE 3845 or Keystone standard