Profile: Auma Riester GmbH & Co. KG deals with electric actuators and valve gearboxes. Our product line includes multi-turn actuators, part-turn actuators, linear actuators, lever actuators, part-turn gearboxes and lever gearboxes. Our electric multi-turn actuators are used for the automation of gate valves or globe valves. Our SG .3 part-turn actuators are of open-close duty type. These actuators have features such as a torque range from 32 Nm to 125 Nm, mechanical position indicators, 3-ph ac, 1-ph ac & dc motors and handwheels.