Belimo SRF24A-5 - rotary actuator for valves with fail-safe function
Belimo SRF24A-5 rotary actuator for ball valves and butterfly valves. Torque 20 Nm, AC/DC 24 V supply, Open/Close control and motor running time 75 s / 90°.
In the event of a power failure, the spring moves the valve to the safety position: NC, valve closed (A–AB = 0%). F05 mounting connection.
Belimo SRF24A-5 – rotary actuator with fail-safe function
This model is designed for ball valves and butterfly valves. During operation, the actuator moves the valve and tensions the return spring; when the power supply is interrupted, the spring moves it to the safety position.
Key parameters
- Motor torque: 20 Nm; fail-safe function torque: 20 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: Open/Close.
- Position after power failure: NC, valve closed (A–AB = 0%); for valves with an L-port: A–AB = 100%.
- Motor running time: 75 s / 90°; fail-safe function operating time: <20 s @ -20...50°C, <60 s @ -30°C.
- Power consumption during operation: 5.5 W; in standby: 1.5 W; for cable sizing: 7.5 VA.
- Power and control connection: 1 m cable, 2x 0.75 mm².
- Mounting connection: F05; IEC/EN degree of protection: IP54.
Operation and installation
The actuator has mechanical position indication and an adjustable rotation angle with mechanical stops. Manual adjustment is possible using the crank and locking switch. Installation on a rotary valve or a flanged butterfly valve allows the orientation to be selected in 90° increments.
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Brand
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ReferenceSRF24A-5
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EAN137630498115059
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AC/DC voltageAC/DC 24 V
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Power consumption (running)5.5 W
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Power consumption (holding)1.5 W
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Rated power7.5 VA
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Power supply control connectionCable 1 m, 2x 0.75 mm²
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Control typeClose/Open
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Protection ratingIP54
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NEMA protection ratingNEMA 2
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Enclosure typeUL Enclosure Type 2
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