Belimo TRF24-S - rotary actuator for ball valves

Belimo TRF24-S

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

Key features and specifications

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

Direct mounting on the ball valve is carried out using one screw; the mounting position relative to the valve can be selected in 90° increments. The actuator has overload protection and stops automatically when it reaches the end stop.