Start/stop valves, also known as on/off or isolating devices, limit actuator motion to preset open and closed positions. Throttling or control devices provide controllable motion so that valves can be ...

Piston Valve Actuators. Image credit: Spirax Sarco Diaphragm actuators have a thin flexible membrane that actuates via a compressed air supply. This type of actuator is single acting because the air ...

ISA96.03 – The basic requirements for pneumatic valve actuators of the single- and double-acting types used for on-off applications. The standard will define the basis pneumatic actuator types (i.e., ...

This standard provides basic requirements for pneumatic valve actuators of the double-acting and single-acting types, used for on-off and modulating valve duties. It includes guidelines, ...