The Pneumatic Diaphragm Rotary actuator share the working system of the diaphragm linear actuator in the diaphragm part.
Subsequently, a piston-crank mechanism converts the linear motion of the stem to another rotary, which can perfomance in quart turn valves such as butterfly valves, ball valves or plug valves.

A handwheel can be incorporated for manual actuation.

Pneumatic Diaphragm Rotary Actuator can be used for regulating and ON/OFF services.

For further information visit also pneumatic diaphragm linear actuators.