Siemens GSD146.1P DAMPER ACTUATOR | NON-SPRING RETURN | 24 VAC/DC | ON/OFF/FLOATING POINT | 20 LB-IN | SWSiemens GSD146. 1P Damper Actuator Non Spring Return 24 VAC DC On Off Floating Point 20 lb in SWDamper Actuator 20 lb in 2 position floating control, non spring return, built in auxiliary switches and plenum rated. Used for low torque VAV applications and small dampers. Additional Information Actuator TypeNon spring return Actuation StyleRotary Control or Fire Smoke TypeControl Damper Plenum or Standard RatingPlenum Torque20 lb in Fail SafeNo Control