Belimo LF24-S-US Spring Return Damper Actuator

Belimo LF24-S-US is a compact spring-return damper actuator delivering 35 in-lb (4 Nm) of torque for direct mounting to dampers, with 0°–95° travel limited by a mechanical stop and no crank arm required. It is a fail-safe, On/Off actuator that operates from 24 V power (AC or DC) and includes a built-in SPDT switch for straightforward damper control, with 3 ft (1 m) of 18 AWG leads and 1/2" conduit connectors, suitable for direct-coupled shafts from 3/8" to 1/2" in diameter. Electrical and environmental specs include 24 VAC (±20%, 50/60 Hz) or 24 VDC (±10%), running about 5 W and holding 2.5 W, and an ambient operating range of -4°F to 122°F (-20°C to 50°C), with motor travel under 75 seconds and fail-safe travel under 25 seconds as conditions allow.