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What is a Scotch Yoke Pneumatic Actuator?
KEYDAL Scotch Yoke Pneumatic Actuator is a type of actuator developed for the automatic control of rotary valves, designed to provide high torque output and durability. Thanks to the Scotch Yoke mechanism, it offers an ideal solution for applications requiring reliable torque distribution. It delivers effective performance especially in the on/off control of equipment such as butterfly valves, ball valves, dampers, industrial flaps, and plug valves. The body of the KEYDAL scotch yoke actuator is made of corrosion-resistant alloy aluminum and is available in both double-acting and spring return configurations. It is also compatible with positioners for precise positioning applications. The ISO 5211 mounting flange allows easy integration with different types of valves. Accessory connections are manufactured according to VDI/VDE 3845 standards, ensuring compatibility across products.
Advantages of Scotch Yoke Pneumatic Actuators
Scotch yoke pneumatic actuators offer significant advantages over competitors, especially in applications requiring high torque such as industrial valves, damper flaps, and flow control gates. Thanks to its mechanical design, it generates the highest torque at the opening and closing points — the critical moments when the equipment seal makes the first contact and disengagement. This efficiently meets the breakaway and seating torques required particularly in butterfly and ball valves. Compared to rack and pinion actuators, they can operate with lower air consumption, providing energy efficiency. Having fewer moving parts also offers long service life and low maintenance cost. The scotch yoke mechanism is the ideal solution for applications that require unbalanced torque generation, ensuring reliable performance under heavy-duty conditions.
General Features of KEYDAL Scotch Yoke Actuators:
Complies with UNI EN 15714-3:2009 standard. ISO connection standard: UNI EN ISO 5211. Auxiliary connection: NAMUR, VDI/VDE 3845. Control angle: 90° (-5°~+3°). Torque: Depending on control pressure and type. Operating temperature: -20℃~+80℃ Pressure: 2-8 bar. Working environment: Filtered, dry or lubricated compressed air. Dew point of the compressed air should comply with (ISO 8573-1:2010, Class 3) ≤ -20℃ or 10℃ below the ambient temperature. According to (ISO 8573-1:2010, Class 5), the maximum particle size must not exceed 40 µm.
Quality Assurance System
Manufactured in accordance with KEYDAL’s quality standards, Scotch Yoke pneumatic actuators are certified with international standards such as ATEX, SIL, and CE, ensuring safe operation. They are a durable and maintenance-friendly solution for harsh field conditions. Our company also applies ISO9001:2015 Quality Management Systems. For more details, you can visit our service philosophy page. To access our brand registration certificate, please click here!
