Belimo LF24-SR Damper Actuator

Belimo LF24-SR Damper Actuator is a dependable HVAC control device designed for direct-coupled, ON/OFF and modulating damper operation with spring return. It runs on 24 Volt AC/DC, supports 50/60 Hz, and provides precise damper positioning through a 2–10 VDC output signal.

Built for rugged environments, the LF24-SR features a zinc-coated steel body with a NEMA 2 / IP54 enclosure for protection against dust and moisture. Its spring-return operation ensures reliable damper positioning, while direct coupling simplifies installation. The unit accepts 24 V AC/DC power (max 24 V) and uses a plenum-rated 3 ft, 18 AWG cable with a 1/2 in conduit connector, making it suitable for modern HVAC systems.

Key Features

• Type: ON/OFF, Direct Coupled, Modulating
• Operation: Spring Return
• Voltage: 24V AC/DC (max 24 V)
• Power: 2.5 W running, 1 W holding
• Torque: 35 in-lb
• Rotation: 95°
• Output: 2–10 VDC @ 0.7 mA
• Enclosure: NEMA 2 / IP54
• Shaft: 3/8" to 1/2" diameter
• Size: 3.86"W × 3.23"D × 7.67"H
• Cable: 3 ft 18 AWG plenum with 1/2" conduit connector
• Operating Temp: -22 to 122°F
• Approvals: UL (Canada/US), UL 873, CE, CAN/CSA C22.2, ISO 9001