Belimo NRF24A Fail-Safe Rotary Actuator for Ball Valves, 10 Nm, 24V

Part number: NRF24A

A fail-safe rotary actuator designed for quarter-turn control ball valves. It delivers a nominal torque of 10 Nm for both motor and spring return operations. The unit operates on 24V AC/DC and can be controlled via a modulating 2-10 VDC signal. The spring return fail-safe function repositions the valve in under 20 seconds.

This actuator is used in stationary heating, ventilation, and air conditioning (HVAC) systems for automating the control of 2-way and 3-way ball valves. The fail-safe function is critical for applications requiring the valve to return to a specific safe position during a power outage.