The Scotch Yoke pneumatic actuator is a high-performance device designed for precise and efficient valve control in diverse industrial applications. Utilizing a distinctive yoke and piston mechanism, it converts the linear force of compressed air into rotational motion, making it particularly effective for quarter-turn valves, such as ball and butterfly valves.
The Scotch yoke pneumatic actuator serves as an efficient valve driving mechanism meticulously engineered to precisely regulate valve switching and cutoff operations. Utilizing a sophisticated yoke and piston mechanism, it converts the linear force generated by compressed air into robust, high-torque rotational movement. This design is particularly well-suited for quarter-turn valves, such as ball and butterfly valves.
Output torque：250000N.M
Mode of action： Single acting, double acting
Power Type： Pneumatic, hydraulic
Manual Type： Screw handwheel, gear, hydraulic manual
Fault location：FC, FO, FL
Ambient temperature: normal temperature, low temperature, high temperature
Accessories: solenoid valve, limit switch, electric positioner, retaining valve
Valve type: ball valve, butterfly valve and other rotary valve
The single acting Scotch Yoke pneumatic actuator apart is its integrated spring return mechanism, which ensures fail-safe operation. In the event of air supply failure, the actuator automatically returns the valve to its default position, thereby enhancing safety and operational reliability.
Compliant with industry standards – Designed to meet ISO5211 standards, our single acting scotch yoke pneumatic actuator is a reliable and efficient choice for your valve system.
High torque output – Capable of up to 250,000Nm (184,000 foot-pounds) of torque, our actuator can handle even the most demanding applications with ease.
Enhanced performance – Our shift fork design reduces lateral loads for smoother operation and improved performance. Plus, its modular structure allows for easier maintenance and part interchangeability.
Built to last – With a cylinder module featuring a built-in guide rod, our actuator prevents wear on piston seals and ensures long-lasting and stable output. Oil-free lubricated bearings also provide durable and consistent performance.
Versatile options – Choose from manual operating mechanisms such as handwheels, gear transmission, or hydraulics. We offer symmetrical or tilted shift forks for customization to fit your needs.
Fail-safe operation – Easily switch between single-action fail-open or fail-close modes by changing the direction of the cylinder and spring module. Efficient and convenient for regulating applications.
Design Parameters
Torque range：
– Double-action: 250,00ONm (184 000 ft lbs)
– Single-action: pneumatic 250,000Nm (184 000 ft lbs)
Spring 110,000Nm (81000 ft lbs)
Air supply pressure
3.5~7BAR (51~101psi)
Air, nitrogen or other pure gases
Temperature range
Normal temperature: -29°C~80C ( -20°F~176°F)
Low temperature: -40°C~80°C ( -40°F~176°F)
Ultra low temperature:-60°℃-80°C (-76°F~176°F)
High temperature: -29°C-160°C ( -20°F~320°F)
Adjustable stroke (0-90°)±6° , total stroke range:80~100°
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