CSY Series

Scotch Yoke Actuator

Pnuematic rotary actuator for valve automation.

pneumatic rotary actuator

Cowan’s Scotch Yoke Valve Actuator has a modular design that allows customization to fit specific needs.


  • Double-Acting or Spring-Return
  • Torques up to 2,500,000 in-lb
  • Operating Pressure: 40 – 100 PSIG
  • Modular Design
  • Pneumatic Rotary Actuator
  • SIL-3 Capable

Valve Compatibility

Our Series CSY Scotch Yoke Actuator is compatible with any process valve that requires rotary motion.

knife gate valve actuator

Butterfly Valve

gate valve actuator

Plug Valve

Segmented Ball Valve

Trunion Ball Valve

Control and Monitoring Solutions

Mounting Kits: ISO, MSS & Customized Patterns Available

Mounting Kits

Cowan valve mounting kits for our Scotch Yoke Actuator can be designed for any rotary valve. Mounting kits available in steel and stainless steel construction.

Automation Packages

Automation Package
Integration of Control Accessories
Solenoid Valves
Pilot Valves
Quick Exhausts

Position Feedback
Limit switches and position sensors
Field-Adjustable for open and close indication
Analog and digital feedback

C-PAC: Cowan Pneumatic Control Manifold

C-PAC Module: Cowan Pneumatic Actuator Control
Compact, Versatile, Simple, Cost Effective
Designed for Linear and 1/4 Turn Actuators
Fail Close, Open, Last or Lock
Cv up to 11.1

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