Belimo SRF24A-SR-S2-O - rotary actuator for ball valves
Rotary actuator with spring-return safety function for ball valves. Torque 20 Nm, AC/DC 24 V supply, 2...10 V modulating control and 2...10 V position feedback signal. When the power supply is disconnected, it sets the valve to the open position (NO).
Motor running time is 90 s / 90°. The actuator has 2 integrated SPDT auxiliary switches and IP54 protection.
Belimo SRF24A-SR-S2-O actuator
Modulating rotary actuator for ball valves. During operation, it positions the valve according to the analogue control signal and tensions the return spring. If the power supply is interrupted, the spring moves the valve to the safety position: open (NO).
Key features
- Motor and safety function torque: 20 Nm.
- Rated voltage: AC/DC 24 V; rated frequency: 50/60 Hz.
- Control range Y: 2...10 V; position feedback signal U: 2...10 V.
- Motor running time: 90 s / 90°; time to safety position: <20 s @ -20...50°C, <60 s @ -30°C.
- 2x SPDT: one switch set to 10%, the other adjustable from 11...100%.
- Power consumption during operation: 5.5 W; at rest: 3 W; for cable sizing: 8.5 VA.
- Power and control connection: 1 m cable, 4x 0.75 mm²; auxiliary switch connection: 1 m cable, 6x 0.75 mm².
- Mechanical position indicator, adjustable rotation angle with mechanical stops, and manual operation using a crank and locking switch.
- Protection rating: IP54; ambient temperature: -30...50°C.
The actuator mounts directly onto the ball valve using one screw; its mounting orientation relative to the valve can be selected in 90° increments.
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Brand
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ReferenceSRF24A-SR-S2-O
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EAN137630498122309
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AC/DC voltageAC/DC 24 V
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Auxiliary switch connectionCable 1 m, 6x 0.75 mm²
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Power consumption (running)4.5 W
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Power consumption (holding)1.5 W
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Rated power6.5 VA
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Power supply control connectionCable 1 m, 4x 0.75 mm²
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Control typeDC 2...10 V
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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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Auxiliary contacts2x SPDT
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