Belimo FSNF120-S Fire & Smoke Actuator S/R W/1M Switch 70 In-lb 120V

The Belimo FSNF120-S Fire and Smoke Damper Actuator is used in HVAC systems. It works at 120V and has 70 in-lb of torque to guarantee proper positioning of the dampers. During normal operation, the actuator maintains the damper in the open or closed position as commanded by the BMS. When there is a fire alarm, the spring returns to a fail-safe position; most of the time this is a closed position that will minimize smoke and fire progression throughout duct systems. This essential task raises the level of building fire safety, prevents fire spread, protects the people and reduces losses.