NRF24A-SZ-S2 - Belimo Spring-return actuator NC 10 Nm, 90 s, 90° AC / DC 24 V | ideal for ball valves

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The Belimo NRF24A-SZ-S2 is a type of Actuator used in HVAC and ventilation systems.

The force applied by the Torque of the NRF24A-SZ-S2 is 10 Nm.

The power supply requested for this Rotary Actuator is 24Vac/Vdc.

If you have questions concerning size or installation, refer to the Belimo custom datasheet above or email iacs for individualised support.

NRF24A-SZ-S2 - Spring-return actuator NC 10 Nm, 90 s, 90° AC / DC 24 V

•    Open/Close, 3-point, 2 x SPDT
•    IP 54, Manual override with integrated position stop
•    Running time spring < 20 s
•    Connection PVC cable 1m
•    Auxiliary switch 2 integral
•    Emergency control closedYES

Features
 

• Mode of operation The actuator is controlled with a standard signal of DC 0 ... 10 V and moves the ball valve to the operating position at the same time as tensioning the return spring. The ball valve is turned back to the emergency position by spring force if the supply voltage is interrupted.
  
  
• Manual override Manual operation of the valve with the hand crank, locking in any position with the interlocking switch. Unlocking is manual or automatic by applying the operating voltage.


• Simple direct mounting Straightforward direct mounting on the ball valve with only one screw. The mounting position in relation to the ball valve can be selected in 90°<) steps.


• Adjustable angle of rotation Adjustable angle of rotation with mechanical end stop.


• High operational reliability The actuator is overload-proof, requires no limit switches and automatically stops when the end stop is reached.
• Flexible signalization The actuator has one auxiliary switch with a fixed setting and one adjustable auxiliary switch. They permit a 10% or 11 ... 100% angle of rotation to be signalled.
  
  
• Combination valve actuators Refer to the valve documentation for suitable valves, their permitted media temperatures and closing pressures.
  

•     Electrical data Nominal voltage AC 24 V, 50/60 Hz / DC 24 V
•     Nominal voltage range AC 19.2 ... 28.8 V / DC 21.6 ... 28.8 V
•     Power consumption In operation 3.5 W @ nominal torque
•     At rest 2.5 W
•     For wire sizing 6 VA
•     Connection Cable 1 m, 4 x 0.75 mm2
•     Parallel connection Yes (Note performance data for supply!)
•     Functional data Torque Motor Min. 10 Nm @ nominal voltage
•     Spring return Min. 10 Nm
•     Direction of rotation Spring return
•     – NRF24A-Sz Deenergised NC, ball valve closed (A – AB = 0%)
•     – NRF24A-sz-O Deenergised NO, ball valve open (A – AB = 100%)
•     Manual override With hand crank and interlocking switch
•     Angle of rotation Max. 90°<)
•     Running time Motor ≤75 s / 90°<)
•     Spring return ≤20 s @ –20 ... 50°C / max. 60 s @ –30°C
•     Sound power level Motor ≤45 dB (A)
•     Spring return ≤62 dB (A)
•     Position indication Mechanical
•     Safety Protection class II totally insulated
•     Degree of protection IP54
•     EMC CE according to 2004/108/EC
•     Low-voltage directive CE according to 2006/95/EC
•     Certification Certified to IEC/EN 60730-1 and IEC/EN 60730-2-14
•     Mode of operation Type 1.AA.B
•     Rated impulse voltage Actuator 0.8 kV Auxiliary switch 2.5 kV
•     Control pollution degree 3
•     Ambient temperature –30 ... +50°C
•     Media temperature +5 ... +130°C (in ball valve, –10°C with stem heating upon request
•     Non-operating temperature –40 ... +80°C
•     Ambient humidity 95% r.h., non-condensating
•     Maintenance Maintenance-free
•     �imensions / Weight Dimensions See «Dimensions» on page 3
•     Weight Approx. 2.2 kg (without ball valve)