Keystone Figure 79U Pneumatic Actuator0 pages

VALVES & CONTROLS

KEYSTONE PNEUMATIC ACTUATOR
79U
Spring Return and Double Acting Pneumatic Quarter-Turn Actuators For Output Torques to 27,624 lb.in.

INTRODUCTION

FEATURES

For remote control of any quarter-turn
application, including ball, butterfly or
rotary plug valves, dampers, etc.

• Compact rack and pinion design
utilizes the whole piston area to
develop output torque.

TECHNICAL DATA

• Pistons with integral rack drive
reduce the number of dynamic seals,
minimizing air leakage.

Max. Supply Pressure:

150 psig

Rated Supply Pressure: 120 psig
Double Acting Torque:

27,624 lb.in. @
120 psig

• Double pistons nullify sideloads on the
pinion shaft, minimizing bearing wear
and extending life.

Spring End Torque:

10,155 lb.in. @
100 psig

• Internal air porting eliminates external
tubing.

Temperature Range:

-4°F to 200°F
[-20°C to 90°C]

• Hard anodized aluminum body with
external electrostatic powder coating
(ESPC) finish protects against corrosive
environments.

Optional Temperature
Ranges Available:

-15°F to 300°F
[-26°C to 150°C]
-40°F to 160°F
[-40°C to 71°C]

• 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

KEYMC-0007-US-0904

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