Overview
The Belimo TFB24-S is a compact spring return damper actuator designed for on/off fail-safe control of small air dampers in HVAC systems.
Features
- Mechanical spring return ensures positive fail-safe damper closure during power loss
- Integrated SPDT auxiliary switch for position indication or system interlocking
- Compact design allows easy installation in tight ductwork spaces
- Universal shaft clamp mounts directly to round or square damper shafts
Specifications
- Torque: 22 in-lb [2.5 Nm]
- Nominal Voltage: AC/DC 24 V
- Control Type: On/Off
- Actuator Type: Spring Return
- Auxiliary Switch: 1 x SPDT
- Damper Area: Up to 5.5 sq ft
Applications
- On/off fail-safe damper control in HVAC duct systems
- Safety shut-off, zone control, and fan interlocking applications





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