Overview
The Belimo TFRX24-SR-S is a spring return modulating valve actuator featuring an auxiliary switch for fail-safe proportional control and status monitoring in hydronic setups.
Features
- Proportional 2 to 10 VDC control input for precise water flow modulation
- Integrated auxiliary switch enables status reporting and equipment interlock functionality
- Spring return fail-safe functionality automatically returns valve during power failure
- Compact and durable enclosure designed for easy field setup
Specifications
- Nominal Voltage: AC/DC 24 V
- Control Type: Modulating (2 to 10 VDC)
- Actuator Type: Spring Return
- Auxiliary Switch: 1 x SPDT
- Torque: 22 in-lb [2.5 Nm]
- Power Consumption: 4 VA transformer rating
Applications
- Modulating hydronic valve control requiring fail-safe protection and position status
- Terminal unit water loops connected to building management monitoring systems


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