"Keystone" Pneumatic Actuator F79U/F89U/F79E/F89E
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02/10/2026 09:10
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"Keystone" Pneumatic Actuator Figure 79U/E, Figure 89U/E
Double Acting (air to air) and Single Acting (spring return), 90° operation, pneumatic actuators
Features & Benefits:
- Compact rack and pinion design utilizes the whole piston area to develop output torque.
- Pistons with integral rack drive reduce the number of dynamic seals, minimizing air leakage.
- Double pistons nullify sideloads on the pinion shaft, minimizing bearing wear and extending life.
- Internal air porting eliminates external tubing.
- Hard anodized aluminum body with external electrostatic powder coating (ESPC) finish protects against corrosive environments.
- Female output drive enables direct mounting of most Keystone valves, eliminating special adaptation connections and assuring correct alignment.
- Bottom entry pinion shaft simplifies assembly and provides anti-blowout feature.
- Anti-friction piston pads ensure no metal-to-metal contact, providing smooth operation. Ideal for modulating or on/off control applications.
- Adjustable travel stops standard in both directions on sizes 065 to 181.
- An extensive range of standard accessories are available for direct mounting.
- Solenoid valves
- Limit switchboxes
- Positioners
- Declutchable manual override gearbox
- High visibility indicator
General Applications:
For remote control of any quarter-turn application, including ball, butterfly or rotary plug valves, dampers, etc.
Technical Data
Max. Supply Pressure: 150 psig
Rated Supply Pressure: 120 psig
Double Acting Torque: 27,624 lb.in. @ 120 psig
Spring End Torque: 10,155 lb.in. @ 100 psig
Temperature Range: -4°F to 200°F [-20°C to 90°C]
Optional Temperature Ranges Available:
-15°F to 300°F [-26°C to 150°C]
-40°F to160°F [-40°C to 71°C]
