Overview
The Belimo TFRX24-S is a 24V spring return valve actuator offering fail-safe on/off control with an auxiliary switch for small hydronic valves in heating and cooling systems.
Features
- Spring return fail-safe positioning upon main power loss
- Integrated auxiliary switch for position feedback and system integration
- Compact and lightweight design ideal for tight mechanical spaces
- Quiet operation with energy-efficient motor management
Specifications
- Nominal Voltage: AC/DC 24 V
- Control Type: On/Off
- Actuator Type: Spring Return with Auxiliary Switch
- Torque/Force: 22 in-lb [2.5 Nm]
- Power Consumption: 2.5 W running, 1 W holding
Applications
- Hydronic zone valve fail-safe control in commercial and residential HVAC
- Fan coil units and unit ventilator isolation valves


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