Single Acting Pneumatic Actuators use air pressure to open the valve and rely on a mechanical spring to close it. This design ensures a fail-safe mechanism, where the valve automatically moves to a default position if air pressure is lost. While these actuators are valued for their reliable safety features, they come with higher costs due to the inclusion of springs, which can wear out over time and lead to larger form factors. They are ideal for applications where safety and simplicity are critical.
