Description
The Belimo LF24-SR-S is a direct-coupled, spring return damper actuator engineered for reliable modulating control in commercial HVAC applications. Featuring a 35 in-lb torque output and a proportional 2–10 Vdc control signal, this actuator provides precise damper positioning for air handling units, VAV systems, and ventilation equipment. The integrated auxiliary switch enables end-position feedback for system monitoring and interlock control, making it an ideal choice for building automation and energy management systems.
Key Features
- Spring return fail-safe operation — damper returns to a defined position on power loss
- 35 in-lb (4 Nm) torque output for reliable damper actuation
- Proportional 2–10 Vdc control signal for precise modulating control
- Universal power supply: 24 Vac / 24 Vdc
- Integrated auxiliary switch for end-position feedback and interlock wiring
- Direct-coupled, shaft-clamp design — no crank arm or linkage required
- Manual override for commissioning and maintenance convenience
- Compact, rugged housing suitable for commercial HVAC environments
Electrical Specifications
- Supply Voltage: 24 Vac / 24 Vdc
- Control Signal: 2–10 Vdc (proportional/modulating)
- Auxiliary Switch: Included
Mechanical Specifications
- Torque: 35 in-lb
- Actuation Type: Spring Return (fail-safe)
- Mounting: Direct-coupled to damper shaft
Typical Applications
- Air handling units (AHUs)
- Variable air volume (VAV) systems
- Outside air and exhaust dampers
- Building automation and energy management systems
- Commercial ventilation and HVAC zoning
The Belimo LF24-SR-S is backed by Belimo’s reputation for quality and longevity, making it a trusted choice for HVAC contractors and building automation professionals. Order from Jackson Systems for fast, reliable delivery.
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