Spring return actuators utilize a combination of air or liquid pressure and spring force to control valve movement. In these actuators, air or liquid applied to one side of the piston opens or closes the valve, while a spring on the opposite side generates the opposite motion. This design is particularly effective for applications requiring immediate shutdown for safety, as the spring ensures reliable and rapid response. The simplicity and reliability of spring return actuators make them ideal for situations where torque is applied on only one side during the activation stroke, ensuring efficient and secure operation.
