Spring return direct-coupled, line voltage actuator that accepts two-position (SPST) control for: air dampers, air handlers, ventilation flaps, louvers, and ball valves.

Features:
Valve Damper Actuator
Spring Return fail safe mode
Zero Internal Auxiliary Switch
Self-centering clamping shaft adapter type
24 Vac or Vdc Supply voltage
-40 to 140 Deg F ambient temperature range
Power Consumption: Driving - 30 VA, Holding - 8 VA
3/8" to 11/16" square shaft dimensions
Integral 1/2" NPSM conduit connection
Includes mounting bracket, self-centering shaft adapter, 3mm crank
5 to 95% RH, non-condensing operating humidity range
Enclosed screw terminal strip (22 to 14 AWG) for electrical connections
Aluminum housing materials, Plenum rated plastic access cover
9.72" high x 3.94" wide x 2.95" deep

📄 Datasheet (Technical Specifications):
Download MS8110A1008 Datasheet (PDF)