Siemens GMA221.1U/B Spring Return Damper Acutator, 62 lb-in (7 Nm), 120 Vac, 2-position Control, 90 sec Run, Bulk 10. Siemens OpenAir GMA Series Spring Return Damper Actuator for light to medium-sized HVAC dampers requiring 62 lb-in of torque. For applications requiring the damper to move to a pre-set, fail-safe position in case of power failure.
