Overview
The Belimo TFRX24-MFT-S is a spring return valve actuator designed for fail-safe, modulating, or programmable control of valves in HVAC systems. It provides reliable fail-safe operation using a mechanical spring return during power outages and includes an integrated auxiliary switch.
Features
- Spring return fail-safe mechanism ensures safe position during power failure
- Multi-Function Technology (MFT) allows custom control signal configurations
- Integrated SPDT auxiliary switch for position feedback and signaling
- Compact design for easy installation in tight control spaces
Specifications
- Nominal Voltage: AC/DC 24 V
- Control Type: MFT / Programmable
- Actuator Type: Spring Return with Auxiliary Switch
- Power Consumption: 2.5 W running, 1 W holding
- Enclosure Rating: IP42 / NEMA 2
Applications
- Fail-safe control of hot and chilled water control valves in commercial HVAC
- Fan coil units, VAV reheat coils, and small air handlers


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