BELIMO NMB24-SR Non-Spring Return Actuator

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Description:

For proportional modulation of dampers in HVAC systems. Actuator sizing should be done in accordance with the damper manufacturer’s specifications.

The actuator is mounted directly to a damper shaft up to 1.05” in diameter by means of its universal clamp, 1/2” self centered default. A crank arm and several mounting brackets are available for applications where the actuator cannot be direct coupled to the damper shaft.

The actuator operates in response to a 2 to 10 VDC, or with the addition of a 500 Ω resistor, a 4 to 20 mA control input from an electronic controller or positioner. A 2 to 10 VDC feedback signal is provided for position indication or master-slave applications.

Features: 

• Torque: 90 in-lb [10 Nm]
• Voltage AC/DC: AC/DC 24V
• Angle of Rotation: 95°
• Shaft Diameter: 1/2...1.05" round, centers on 1/2" and 3/4" with insert 
• Actuator Type: Non-Fail Safe
• Manual Override: External Push Button
• Application: Air
• Control Type: Modulating
• Degree of Protection: IP54, NEMA 2, UL Enclosure Type 2
  
• Running Time (Motor): 95 s constant independent of load

Resources:

• BELIMO NMB24-SR Non-Spring Return Actuator Technical Literature
• BELIMO NMB24-SR Non-Spring Return Actuator Installation Instructions