Description
The Belimo LF24-SR is a direct-coupled, spring return damper actuator engineered for reliable modulating control in HVAC air handling and ventilation applications. Designed to mount directly to damper shafts without the need for crank arms or linkages, this actuator simplifies installation and reduces potential failure points in the field.
Key Features
- Spring return fail-safe operation ensures damper returns to a defined position upon power loss
- 35 in-lb (4 Nm) torque output suitable for small-to-mid-size damper applications
- Modulating 2–10 Vdc control signal for precise damper positioning
- Compatible with 24 Vac and 24 Vdc power supplies for flexible system integration
- Direct-coupled design eliminates crank arms and external linkages
- Compact, lightweight housing ideal for tight mechanical spaces
- Manual override function allows damper positioning during commissioning or maintenance
- Plenum-rated construction for installation in air-handling environments
Electrical Specifications
- Supply Voltage: 24 Vac / 24 Vdc
- Control Signal: 2–10 Vdc (modulating)
- Torque: 35 in-lb
Applications
- Air handling units (AHUs)
- Variable air volume (VAV) systems
- Commercial HVAC ventilation and fresh-air damper control
- Building automation and energy management systems
Why Choose the Belimo LF24-SR?
Belimo is a globally recognized leader in actuator technology, and the LF24-SR reflects their commitment to precision, reliability, and ease of installation. The spring return mechanism provides critical fail-safe functionality — a must-have in life-safety and energy-management applications where damper position at power loss is essential. With broad voltage compatibility and a modulating control input, this actuator integrates seamlessly into modern BAS and DDC control systems.
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