Belimo’s new NFB Series sets a new standard for direct-coupled spring return actuators in the HVAC market. A compact size, low power consumption and 50% increase in minimum torque output set the new NFB apart
from other market solutions. More torque combined with faster running times for both motor drive and spring return widen the application fields giving customers a cost effective solution with high quality.
| Product Type | Damper Actuator |
|---|
| Fail-Safe | Spring |
| Torque | 90 in-lb [10 Nm] |
| Control Input | On/Off |
| Input Impedance | -- |
| Position Feedback | -- |
| Running Time (motor) | <75 seconds |
| Running Time (fail-safe) | 20 sec @ -4°F to +122°F [-20°C to +50°C], <60 sec @ -22°F [-30°C] |
| Auxiliary Switch | -- |
| Power Supply | 24…240 VAC +10% / -20%, 50/60 Hz, 24…125 VDC ± 10% |
| Power Consumption | Running: 6 W; Holding 2.5 W |
| Transformer Sizing | 6 VA @ 24 VAC (Class 2 power source), 6.5 VA @ 120 VAC, 9.5 VA @ 240 VAC |
| Electrical Connection | 3 ft, 18 GA appliance cable, 1/2" conduit connector |
| Overload Protection | Electronic throughout 0° to 95° rotation |
| Shaft Diameter | Standard: 1/2" to 1.05" round, centers on 1/2" and 3/4" with insert, 1.05" without insert |
| Angle of Rotation | 95° (adjustable with mechanical end stop, 35° to 95°) |
| Direction of Rotation (motor) | Reversible with CW/CCW mounting |
| Direction of Rotation (fail-safe) | Reversible with CW/CCW mounting |
| Position Indication | Visual indicator, 0° to 95° (0° is spring return position) |
| Manual Override | 5 mm hex crank (3/16" Allen), supplied |
| Humidity | Max. 95% RH non-condensing |
| Ambient Temperature | -22°F to +122°F [-30°C TO +50°C] |
| Ambient Temperature (safety) | -- |
| Storage Temperature | -40°F to +176°F [-40°C TO +80°C] |
| Noise Level | <50dB(A) motor @ 75 seconds, ≤62dB(A) spring return |
| Housing Material | zinc coated metal and plastic casing |
| Housing | NEMA 2, IP54, Enclosure Type 2 |
| Agency Listing | cULus acc. To UL60730-1A/-2-14, CAN/CSA E60730-1:02, CE acc. To 2004/108/EC & 2006/95/EC |
| Quality Standards | ISO 9001 |
| Weight | 4.15 lbs (1.9 kg.); 4.4 lbs (2.0 kg.) with switches |
