Belimo AFB24‑SR 24V Spring Return Modulating Damper Actuator – 180 in‑lb

Belimo AFB24‑SR Damper Actuator – 24V, Spring Return, Modulating – 180 in‑lb

High‑Performance Damper Control for Commercial HVAC Systems

The Belimo AFB24‑SR is a premium 24V spring‑return modulating damper actuator engineered for reliable airflow control in commercial and industrial HVAC applications. With a powerful 180 in‑lb torque and precision 2–10V or 4–20mA modulating control, this actuator delivers smooth, accurate damper positioning for VAV systems, air handlers, rooftop units, and ventilation equipment.

Designed for long‑term durability, the AFB24‑SR features Belimo’s trusted fail‑safe spring‑return mechanism, ensuring dampers automatically move to a safe position during power loss — protecting equipment and maintaining system safety.

Key Features

• 24V AC/DC power for universal HVAC compatibility

• Modulating control (2–10V) for precise airflow regulation

• 180 in‑lb torque to handle medium‑to‑large dampers

• Spring‑return fail‑safe for emergency shutdown and safety compliance

• Direct-coupled design for fast installation and secure mounting

• Manual override for easy field adjustments

• Maintenance‑free motor with long service life

• UL and ISO certified components for dependable performance

Technical Specifications

• Model: Belimo AFB24‑SR

• Torque: 180 in‑lb (20 Nm)

• Control Type: Modulating (2–10V DC)

• Power Supply: 24V AC/DC

• Fail‑Safe: Spring return

• Application: HVAC dampers, VAV boxes, air handlers, ventilation systems

• Material: High‑strength engineered plastic housing

• Dimensions: 3.15" × 9.69" × 3.42" (approx.)

Ideal For

• Commercial HVAC contractors

• Facility maintenance teams

• Building automation upgrades

• Airflow balancing and control projects

• Replacement of older Belimo or Honeywell actuators