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Part-Turn Actuators

In compliance with ISO 5211, part-turn actuators transmit torque to the valve for a rotation of one revolution or less. They do not have to be capable of withstanding axial thrust. Part-turn valves – such as butterfly valves and ball valves – are often designed in multi-turn versions. SQ part-turn actuators are equipped with internal end stops to allow precise approaching of end positions during handwheel Operation.


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