Belimo AF Series Spring Return Damper Actuator

Manufacturer: Belimo

The AFB and AFX series actuators provide true spring return operation for reliable failsafe application and positive close off on air tight dampers. The spring return system provides constant torque to the damper with, and without, power applied to the actuator.

The AFB and AFX series provides 95° of rotation and is provided with a graduated position indicator showing 0° to 95°. The actuator may be stalled anywhere in its normal rotation without the need of mechanical end switches. The AFB24-S and AFX24-S versions are provided with two built-in auxiliary switches.

These SPDT switches are provided for safety interfacing or signaling, for example, for fan start-up. The switching function at the fail-safe position is fixed at +10°, the other switch function is adjustable between +10° to +90°. The AFB24, AFB24-S, AFX24 and AFX24-S actuator is shipped at +5° (5° from full fail-safe) to provide automatic compression against damper gaskets for tight shut-off.

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Features Applications Model

Cut labor costs with simple direct coupling.
True mechanical spring return - the most reliable fail-safe.
Reverse mount for clockwise or counterclockwise fail-safe.
Check damper position easily with clear position indicator.
Overload-proof throughout rotation
Temporary restrictions in damper movement will not change actuator operation. Actuator returns to normal operation when restriction is removed (modulating actuators).
Built-in mechanical stop to adjust angle of rotation.
By eliminating internal condensation incorporated breather membrane optimizes performance in harsh airstream environments.
Built-in auxiliary switches is easy to use, offers feedback or signal for additional device (-S models).
Manual override crank speeds installation
Need to change control direction
Do it easily with a simple switch (modulating actuators).

for applications where the actuator cannot be direct coupled to the damper shaft

Mfr. Part No.	Description
AFB24	Spring, 180in-lb, On/Off, 24V
AFB24-S	Spring, 180in-lb, On/Off, 24V, SW
AFX24	Spring, 180in-lb, On/Off, 24V
AFX24-S	Spring, 180in-lb, On/Off, 24V, SW
AFBUP	Spring, 180in-lb, On/Off, UP
AFBUP-S	Spring, 180in-lb, On/Off, UP, SW
AFXUP	Spring, 180in-lb, On/Off, UP
AFXUP-S	Spring, 180in-lb, On/Off, UP, SW
AFB24-SR	Spring, 180in-lb, 2-10V, 24V
AFB24-SR-S	Spring, 180in-lb, 2-10V, 24V, SW
AFX24-SR	Spring, 180in-lb, 2-10V, 24V
AFX24-SR-S	Spring, 180in-lb, 2-10V, 24V, SW
AFB24-MFT	Spring, 180in-lb, MFT, 24V
AFB24-MFT-S	Spring, 180in-lb, MFT, 24V, SW
AFX24-MFT	Spring, 180in-lb, MFT, 24V
AFX24-MFT-S	Spring, 180in-lb, MFT, 24V, SW
AFB24-MFT95	Spring, 180in-lb, 0-135Ω, 24V
AFB24-PC	Spring, 180in-lb, Phase Cut, 24V

Belimo AF Series Spring Return Damper Actuator

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