Part-turn actuators
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 version. SA part-turn actuators with direct actuation capabilities uses planetary gear mechanism to achieve part-turn operation.
Part-turn actuation can also be achieved by combining SA range multi-turn actuators with part-turn flange mounted (GS) and foot mounted (GF) worm gearboxes.