Belimo TRF24 - rotary actuator for ball valves

Belimo TRF24 actuator

TRF24 is a rotary actuator for ball valves. During operation, it moves the valve to the operating position and tensions the return spring. If the power supply is interrupted, the spring moves the valve to the NC safety position.

Key technical data

• Motor and safety function torque: 2.5 Nm.
• Nominal voltage: AC/DC 24 V; frequency: 50/60 Hz.
• Nominal voltage range: AC 19.2...28.8 V / DC 21.6...28.8 V.
• Control: Close/Open.
• Motor running time: 75 s / 90°; safety function running time: <75 s / 90°.
• On power failure: NC, valve closed (A–AB = 0%); for valves with an L-shaped port: A–AB = 100%.
• Power consumption during operation: 2.5 W; in standby position: 1.5 W; for wire sizing: 5 VA.
• Power and control connection: 1 m cable, 2x 0.75 mm².
• Mechanical position indicator; degree of protection IP42.
• Ambient temperature: -30...50°C.

The actuator is mounted directly on the ball valve using one screw; the mounting orientation can be selected in 90° increments. The device has overload protection and stops automatically when the end stop is reached.