Overview
The Belimo TFRX24-3-S is a spring return valve actuator with an auxiliary end switch, delivering fail-safe on/off or floating point control in HVAC applications.
Features
- Integrated SPDT auxiliary switch allows end-position signaling and status feedback
- Spring return fail-safe design guarantees default valve placement during power outages
- Supports floating point and 2-position control logic from building automation systems
- Direct mounting capabilities for compact characterized control valves
Specifications
- Nominal Voltage: AC/DC 24 V
- Control Type: On/Off, Floating Point
- Actuator Type: Spring Return
- Auxiliary Switch: 1 x SPDT
- Torque: 22 in-lb [2.5 Nm]
- Enclosure Rating: NEMA 2 / IP42
Applications
- Fail-safe zone valve control with status interlocks for fan or pump operation
- Hydronic heating and cooling loops in commercial HVAC facilities


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