Belimo NRF230A-3-S2 - rotary actuator for ball valves

Belimo NRF230A-3-S2

Rotary actuator for ball valves. During operation, it moves the valve and tensions the return spring. If the power supply is interrupted, the spring moves the valve to the NC safety position, valve closed (A–AB = 0%).

Key parameters

• Motor and safety function torque: 10 Nm.
• Rated voltage: AC 100...240 V; frequency: 50/60 Hz.
• Control: 3-point; motor running time: 90 s / 90°.
• Safety function running time: <20 s @ -20...50°C, <60 s @ -30°C.
• Auxiliary switches: 2x SPDT, 1x 10% / 1x 11...100%.
• Power consumption: 4 W during operation, 3 W at rest; power rating for cable sizing: 15 VA.
• Power and control connection: 1 m cable, 4x 0.75 mm²; auxiliary switch connection: 1 m cable, 6x 0.75 mm².
• Degree of protection IEC/EN: IP54; NEMA/UL: NEMA 2.
• Ambient temperature: -30...50°C.

Operation and installation

The actuator is mounted directly on the ball valve using one screw. Its position relative to the valve can be selected in 90° increments. Features include manual adjustment with a crank and position lock, a mechanical position indicator, and rotation angle adjustment using mechanical stops.