Belimo TFRB120 Spring Return Valve Actuator

Belimo TFRB120-S Spring Return Valve Actuator is a two-position, spring-return electrical actuator designed for Belimo 1/2 in to 3/4 in valve bodies used in HVAC systems. It is powered from AC power in the 100–240 V range and operates on an On/Off control signal, with a built-in spring that returns the valve to its fail-safe position when power or the control signal is removed. The unit is compatible with Belimo characterized control valves and mounts on compatible valve assemblies for retrofits in commercial HVAC applications. A built-in SPDT feedback switch provides a straightforward position indication for control systems, aiding sequencing and monitoring. Typical installations include hydronic heating and cooling loops, chilled-water systems, and boiler plant connections where two-position valve control and fail-safe response are required in tight spaces. The TFRB120-S is part of Belimo’s valve actuator family and operates on 100–240 VAC with On/Off control, designed to integrate with Belimo valve bodies in building automation systems.