Linear Pneumatic Actuator In Linear pneumatic actuators, the spring/diaphragm and piston styles are common. The piston actuator moves up with pneumatic pressure and down with the spring, while the spring/diaphragm actuator operates valves using pressure on the diaphragm. It can be configured to "fail-open" or "fail-closed" based on the spring and pneumatic supply arrangement. #ProcessControl #ValveActuation #RealPars | RealPars