Belimo GRK24A-SZ-5 - analog rotary actuator with safety function
Belimo GRK24A-SZ-5 rotary actuator for rotary valves and butterfly valves. Torque 40 Nm, power supply AC/DC 24 V, analog control 0.5...10 V and feedback signal 0.5...10 V.
If the power supply fails, energy stored in the capacitors enables the valve to be moved to the selected safety position.
Belimo GRK24A-SZ-5
Analog rotary actuator with safety function for rotary valves and butterfly valves. During normal operation, the actuator positions the valve as required and charges the built-in capacitors. If the power supply fails, it uses the stored energy to move the valve to the safety position.
Key features and specifications
- Motor torque: 40 Nm; rated voltage: AC/DC 24 V.
- Operating range Y: 0.5...10 V; feedback signal U: 0.5...10 V.
- Safety position: NC/NO or adjustable from 0...100% using the POP dial, in 10% increments.
- Power-failure override time (PF): 2s; motor running time: 150 s / 90°; safety function running time: 35 s / 90°.
- Flange connection: F05; power / control connection: Cable 1 m, 4x 0.75 mm².
- Power consumption during operation: 11 W; in standby: 3 W; rated power: 21 VA.
- Enclosure protection rating IEC/EN: IP54; protection rating NEMA/UL: NEMA 2.
- Manual override using a push-button; rotation angle adjustable with mechanical stops.
The actuator is designed for stationary heating, ventilation and air-conditioning systems. The capacitors are supplied fully discharged and must be charged for approximately 20 s before commissioning.
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Brand
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ReferenceGRK24A-SZ-5
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AC/DC voltageAC/DC 24 V
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Power consumption (running)11 W
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Power consumption (holding)3 W
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Rated power21 VA
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Power supply control connectionCable 1 m, 4x 0.75 mm²
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Control typeDC 0.5...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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