Siemens GSD161.1P DAMPER ACTUATOR | NON-SPRING RETURN | 24 VAC/DC | 0-10VDC / 2-10VDC | 20 LB-INSiemens GSD161. 1P Damper Actuator Non Spring Return 24 VAC DC 0 10Vdc 2 10Vdc 20 lb inDamper Actuator 20 lb in 0(2) to 10 modulating control signal, non spring return plenum rated 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 Signal0 10Vdc 2 10Vdc Positioning