Description
Belimo LFX24-SR — Spring Return Damper Actuator
The Belimo LFX24-SR is a direct-coupled, spring return damper actuator engineered for precise proportional control in commercial and industrial HVAC systems. Accepting a 2–10 VDC control signal and powered by 24V AC/DC, this actuator delivers dependable, fail-safe damper positioning with 35 in-lb of torque — making it well-suited for a wide range of air handling, ventilation, and building automation applications.
The spring return mechanism ensures the damper automatically returns to its fail-safe position upon loss of power or control signal, a critical safety feature for smoke control, economizer, and fresh-air damper applications. Belimo’s LFX series is recognized throughout the industry for its compact, robust design and straightforward direct-shaft mounting that eliminates the need for crank arms or linkages.
Key Features
- Power Supply: 24V AC/DC
- Control Signal: 2–10 VDC proportional
- Torque Output: 35 in-lb
- Spring Return (S/R) fail-safe operation
- Direct-coupled, shaft-mount design — no linkage required
- Proportional control for precise damper positioning
- Compact, low-profile housing for tight installation spaces
- Suitable for commercial and light industrial HVAC applications
Applications
- Air handling units (AHUs)
- Ventilation and fresh-air dampers
- Economizer damper control
- Building automation and DDC systems
- VAV and constant-volume HVAC systems
Why Choose Belimo?
Belimo is the global leader in actuator, control valve, and sensor solutions for heating, ventilation, and air conditioning systems. The LFX24-SR reflects Belimo’s commitment to energy efficiency, installation simplicity, and long-term reliability — backed by decades of field-proven performance trusted by mechanical contractors and building automation engineers worldwide.
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