Siemens GSD346.1U DAMPER ACTUATOR | NON-SPRING RETURN | 120 TO 230 VAC | ON/OFF/FLOATING POINT | 20 LB-IN | SWSiemens GSD346. 1U Damper Actuator Non Spring Return 120 to 230 VAC On Off Floating Point 20 lb in SWDamper Actuator 20 lb in 2 position floating control, non spring return, built in auxiliary switches, supply voltage 100 to 240 VAC. 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 RatingStandard Torque20 lb in Fail