Description
The Belimo LFX24-SR-S is a professional-grade, spring return damper actuator engineered for precise modulating control in commercial and industrial HVAC applications. Powered by 24VAC/DC, it accepts both 2–10VDC and 4–20mA control signals, offering broad compatibility with a wide range of building automation and direct digital control (DDC) systems.
Key Features
- Operating voltage: 24VAC/DC for flexible power supply compatibility
- Modulating control input: 2–10VDC and 4–20mA signals accepted
- Spring return (S/R) fail-safe operation — damper returns to a safe position on power loss
- 35 lb-in (4 Nm) torque output for reliable damper actuation
- Designed for use with Belimo LF-series dampers and compatible HVAC damper assemblies
- Compact, low-profile design for easy installation in tight mechanical spaces
- Manual override function for commissioning and maintenance convenience
- Suitable for ventilation, exhaust, return air, and mixed-air damper control applications
Control Signal Compatibility
- 2–10VDC proportional control
- 4–20mA proportional control
- Compatible with most BAS/DDC controllers and building management systems
Fail-Safe Spring Return Operation
The spring return mechanism ensures the actuator drives the damper to a predetermined safe position whenever power is interrupted. This critical fail-safe feature makes the LFX24-SR-S ideal for life-safety, smoke control, and energy management applications where reliable damper positioning is essential.
Applications
- VAV and CAV air handling units
- Ventilation and exhaust damper control
- Mixed-air and economizer damper systems
- Commercial building automation systems
- Industrial HVAC process control
Why Choose Belimo
Belimo is a globally recognized leader in actuator and valve technology for HVAC systems. The LFX24-SR-S reflects Belimo’s commitment to precision engineering, long service life, and energy-efficient performance — making it a trusted choice for HVAC contractors, engineers, and building automation professionals.
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