Pneumatic Rotary Actuator is an actuating device that uses pneumatic pressure to drive the opening, closing or regulating of valves, also known as Pneumatic Rotary Actuators or pneumatic device, but generally referred to as pneumatic head. The actuator and regulating mechanism of pneumatic actuators are a unified whole, and their actuators include diaphragm type, piston type, fork type, and gear rack type.
Piston type with long stroke, suitable for situations requiring high thrust; The thin film type has a smaller stroke and can only directly drive the valve stem. Fork type pneumatic actuators have the characteristics of high torque, small space, and torque curves that better match the torque curve of valves, but they are not very aesthetically pleasing; Commonly used on valves with high torque. Gear and rack pneumatic actuators have the advantages of simple structure, smooth and reliable action, and safety and explosion prevention. They are widely used in production processes with high safety requirements such as power plants, chemicals, and refineries.
https://www.xm-valveactuator.com/n/news/...y-actuator