Belimo SRF24A-S2-R - rotary actuator with spring return

Belimo SRF24A-S2-R

RetroFIT+ rotary actuator for rotary valves and dampers. During operation, the actuator moves the valve and tensions the spring return; when the power supply is interrupted, the spring moves the valve to the safety position.

Key features and specifications

• Motor and safety function torque: 20 Nm.
• Rated voltage: AC/DC 24 V; frequency: 50/60 Hz.
• Control: Close/Open; motor running time: 75 s / 90°.
• Safety function running time: <20 s @ -20...50°C, <60 s @ -30°C.
• Selectable safety function direction: NC, valve closed (A–AB = 0%), or NO, valve open (A–AB = 100%) when the power supply fails.
• Auxiliary switches: 2x SPDT, 1x 10% / 1x 11...100%.
• Power consumption during operation: 5.5 W; at rest: 1.5 W; for cable sizing: 7.5 VA.
• Power and control connection: 1 m cable, 2x 0.75 mm²; auxiliary switch connection: 1 m cable, 6x 0.75 mm².
• Connection flange: F03/F04/F05; degree of protection: IP54.
• Manual override using a crank and locking switch; mechanical position indicator and adjustable rotation angle with mechanical stops.

The valve stem adapter is not included with the product.