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 butterfl y valves and ball valves - are often designed in multi-turn version. SQ part-turn actuators are equipped with internal end stops to allow precise approaching of end positions during handwheel Operation.