Our pneumatic rotary actuators are used to actuate control valves, butterfly valves as well as plug and ball valves in process and plant engineering applications. When combined with a positioner, they can also be employed in throttling service.

Single-acting or double-acting piston actuators for butterfly valves and other final control elements with rotary closure members are mainly used to meet the high requirements to be fulfilled in chemical plants.

The pneumatic rotary actuators come with a rolling diaphragm and central return spring. The applied signal pressure creates a force at the diaphragm area that counteracts the compression spring in the actuator.

Refer to the product documentation for further details  red arrow
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