How Pneumatic Rotary Vane Actuators Work
Pneumatic rotary vane actuators use a vane connected to a shaft to produce rotational movement. The vane is assembled inside a 2-piece clam-shell enclosure. The presence of the vane creates two air chambers. By pressurizing and venting opposing chambers, the resulting pressure differential across the vane provides torque to the shaft. Torque output of the rotary vane actuator remains constant throughout the full rotation of the shaft.