Pneumatic valves control the movement of compressed air supplied or discharged from 1 or either side of the cylinder. These valves may be actuated electrically, with exterior air resources or manually by a device operator. Pneumatic actuators control ball valves through the conversion of compressed air Strength to mechanical motion. https://butterflyvalve82581.thenerdsblog.com/18047855/the-2-minute-rule-for-pneumatic-actuator-solenoid-valve