The GCA Series Spring Return Electric Damper Actuator is designed to control building HVAC dampers. This actuator has a 142 lb.-in torque, 0 to 10 DC, 24 Vic/dc control and standard cabling. It is ideal for Constant or Variable Air Volume installations for controlling return air, mixed air, exhaust and face and bypass dampers that require up to 142 lb.-in. (16 Nm) torque. The GCA Damper Actuator is designed for applications where the damper is required to return to a fail-safe position when there is a power failure.