Series DDC Direct Coupled Actuators are non-spring return actuators that are perfect for positioning of dampers and valves in HVAC Systems. Actuators are designed to accept 4 to 20 mA or 0 to 10 VDC modulating control signals and are 24 VAC powered. Actuators produce 17 to 70 in-lb (2 to 8 Nm) of torque. Unit features a 0 to 10 VDC feedback signal of damper position.