Scotch and Yoke Pneumatic Actuator
Resistant
Sealing
Operation
Long Life
The Scotch and Yoke Pneumatic Actuator is a high-performance quarter-turn actuator engineered to automate ball valves, butterfly valves, and plug valves. Designed to deliver exceptionally high torque, it is ideal for demanding industrial applications involving high-pressure valves and large-diameter pipelines. Available in Double Acting and Spring Return (Fail-Safe) configurations, it provides reliable, efficient, and long-lasting valve automation.
Specifications
Operation
Pneumatic
Action
Double Acting / Spring Return
Torque Range
Application & Model Dependent
Body Material
Carbon Steel / Aluminum Alloy
Yoke Material
Carbon Steel / Alloy Steel
Rotation Angle
90° / Adjustable
Control Accessories
Solenoid Valve / Limit Switch / Positioner / AFR
Valve Compatibility
Ball Valve / Butterfly Valve / Plug Valve
Mechanism
Scotch & Yoke
Output Motion
Rotary, 90°
Air Supply Pressure
Typically 3–8 Bar
Piston Material
Aluminum Alloy / Steel
Spring Material
Spring Steel
Operating Temperature
Typically -20°C to +80°C
Fail-Safe Option
Fail Open / Fail Close
Product Images
Frequently Ask Questions
It is a rotary actuator that converts linear piston motion into rotational movement using a scotch & yoke mechanism. It is widely used for quarter-turn valves.
Alis Valves is a trusted manufacturer offering heavy-duty and high-torque pneumatic actuators. They provide reliable solutions for critical industrial applications.
Compressed air moves a piston linearly, which rotates the shaft via a yoke mechanism. This converts linear motion into rotary motion for valve operation.
Scotch & yoke provides higher torque and is used for heavy-duty valves. Rack & pinion is compact and suitable for smaller, lighter applications.
They are used for operating ball, butterfly, and plug valves in high torque applications. Common in oil & gas, refineries, and heavy industries.
Choose based on required torque, valve size, air pressure, and application type. Also consider fail-safe option and environmental conditions.
Fail-safe ensures the actuator moves to a predefined position during air failure. This is achieved using spring return or hydraulic backup.
Yes, they can be integrated with solenoid valves, positioners, and control systems. This allows remote and automated valve operation.
