Belimo TFX24-S Actuator

The Belimo TFX24-S Actuator is a reliable spring return damper actuator designed for on/off control in HVAC systems. Providing 22 in-lb torque, this compact unit is engineered for small dampers and air boxes where tight space and failsafe operation are critical. Operating on either 24VAC or 24VDC, the TFX24-S draws minimal power, making it an efficient choice for large-scale HVAC automation retrofits. This model features an integrated SPDT auxiliary switch, pre-set at 95°, to provide verifiable position feedback or to trigger secondary equipment upon reaching the end-of-stroke. The mechanical spring return ensures 100% fail-safe positioning during power interruptions. Built for longevity in light industrial and commercial environments, the Belimo actuator mounts directly to a universal shaft clamp, reducing installation time for technicians. The rugged construction and brushless motor technology maintain consistent timing and torque output throughout the service life of the component.

• Fail-Safe Reliability: Mechanical spring return ensures damps return to a safe position during power loss.
• Position Feedback: Built-in auxiliary switch (S suffix) allows for easy monitoring of actuator status.
• Universal Power: Compatible with 24V power supplies, simplifying field wiring and transformer sizing.
• Compact Footprint: Narrow design allows for installation in restrictive ductwork and plenum spaces.
• Brushless DC Motor: Controlled motor speed prevents water hammer in valve applications and ensures consistent opening/closing times.

What is the difference between the TFX24 and the TFX24-S?
The "S" model includes an integrated auxiliary switch for end-stop signaling, whereas the standard TFX24 provides only the actuation without position feedback.

Can this actuator be used on both 24VAC and 24VDC circuits?
Yes, the electronic fail-safe actuator is designed to operate on a Class 2 power supply at either 24VAC or 24VDC without modification.

How do I change the direction of the spring return?
The direction of the spring return stroke is determined by which side of the actuator is mounted to the damper shaft; simply flip the unit to change between normally open and normally closed operation.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.