Siemens SQM33 Actuator For Oil And Gas Dampers For air dampers and control valves of oil or gas burners Electromotoric actuators For SQM33.4... up to 1.2 Nm nominal output torque For SQM33.5... up to 3 Nm nominal output torque self-holding torque Running time for 90 degree angle: 5-120 s depending on type of basic unit (LMV2... / LMV3...)