Belimo TRF24-S-O - rotary actuator for ball valves

Belimo TRF24-S-O rotary actuator

TRF24-S-O is an actuator for ball valves with a safety function. During operation, it moves the valve and tensions the return spring. If the power supply is interrupted, the spring moves the valve to the safety position: open (NO).

Key features and specifications

• Motor and safety function torque: 2.5 Nm.
• Nominal voltage: AC/DC 24 V; frequency: 50/60 Hz.
• Control: Close/Open.
• Motor running time: 75 s / 90°; safety function running time: <75 s / 90°.
• Integrated auxiliary switch: 1x SPDT, adjustable within 0...100%.
• Power consumption during operation: 2.5 W; at rest: 1.5 W; for cable sizing: 5 VA.
• Power supply and control connection: cable 1 m, 2x 0.75 mm²; auxiliary switch connection: cable 1 m, 3x 0.75 mm².
• Mechanical position indicator and mechanical rotation angle limiter.
• Degree of protection: IP42; ambient temperature: -30...50°C.

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