FQG series linear actuator uses compressed air to completethe action of a power actuator. These actuators can be used
with linear pneumatic series valve that include Gate valve, globevalve, slurry valve etc. The actuators are available as eitherdouble-acting or single-acting. Double-acting actuators switchesare driven by air pressure. Single-acting actuators switches arealso driven by air pressure. However, a spring-loaded model isavailable. Thus, depending on the specific requirement, theactuator control mode can choose switching mode or modulating mode.Usually the actuator is a whole structure, Implementing machine andmodulate machine are unified whole.       

pneumatic actuator with hand wheel