Explanation of technical terms
Thread Content
Is a positioner an actuator? How to distinguish between single-acting and double-acting?
Single-acting and double-acting generally refer to cylinder actuators. Single-acting: The movement of the cylinder is driven by the pressure of instrument air, while the return movement is powered by a spring. Double-acting: Both the movement and return of the cylinder are powered by instrument air. The torque of a single-acting type is much smaller than that of a double-acting type. Therefore, double-acting types are generally used for valves that require high torque