Description
The Belimo AFB24-MFT is a programmable spring return damper actuator delivering 180 in-lb (20 Nm) of torque for precise airflow control in HVAC systems. It operates on AC/DC 24 V power and supports multiple control modes with configurable input and feedback signals.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Belimo |
| Category |
Actuators & Dampers |
| Part Number |
AFB24-MFT |
| Subcategory |
Damper Actuators |
| Nominal Voltage |
AC/DC 24 V |
| Nominal Frequency |
50/60 Hz |
| Voltage Range |
AC 19.2…28.8 V / DC 21.6…28.8 V |
| Power Consumption (Operation) |
7.5 W |
| Power Consumption (Rest) |
3 W |
| Transformer Sizing |
10 VA |
| Control Signal |
2…10 V, configurable MFT |
| Input Impedance |
100 kΩ (2…10 V), 500 Ω (4…20 mA), 1500 Ω (PWM/On-Off/Floating) |
| Operating Modes |
VDC, On/Off, Floating Point |
| Position Feedback |
2…10 V |
| Torque Output |
180 in-lb (20 Nm) |
| Angle of Rotation |
35…95°, adjustable |
| Running Time (Motor) |
70…220 s / 90° |
| Running Time (Fail-Safe) |
<20 s @ -20…50°C |
| Electrical Connection |
18 GA cable, 1 m, 1/2" conduit |
| Ambient Temperature |
-30…50°C |
| Ambient Humidity |
Max. 95% RH, non-condensing |
| Weight |
4.1 lb (1.9 kg) |
Information About AFB24-MFT
The AFB24-MFT is part of Belimo’s AFB series of multi-functional spring return actuators developed for flexible and intelligent HVAC damper control. It features electronic overload protection across the full rotation range and a double-insulated design to support reliable long-term operation. The actuator uses Belimo’s MFT technology, allowing field configuration of control signals, operating ranges, and response behavior to match specific system requirements. Reversible fail-safe action, adjustable mechanical end stops, and selectable motor direction provide installation flexibility across a wide range of damper applications.
Key Features
- Multi-Functional Technology MFT: Supports configurable control modes including 2…10 V, 4…20 mA, PWM, on/off, and floating point for maximum system compatibility.
- Spring Return Fail-Safe Operation: Integrated spring mechanism ensures rapid return to a predefined safety position during power loss.
- 20 Nm Constant Torque Output: Provides stable 180 in-lb torque suitable for medium and large dampers under varying airflow conditions.
- Configurable Control Range: Adjustable start and end points allow precise matching of actuator response to control system requirements.
- Integrated Position Feedback: Delivers a variable 2…10 V feedback signal for continuous monitoring and closed-loop control.
- Electronic Overload Protection: Protects internal components throughout the full 0…95° rotation range against mechanical overload.
- Manual Override Capability: Supplied hex crank enables manual positioning during commissioning, testing, or maintenance.
The AFB24-MFT delivers the reliability and precision required for advanced modulating airflow control and dependable fail-safe damper operation in HVAC systems.
