Actuadores para damper C/regreso de resorte Serie NFB-X
The NFB N4(H), NFX N4 series actuators provide true spring return operation for reliable fail-safe application and positive close off on air tight dampers. The spring return system provides constant torque to the damper with, and without, power applied to the actuator.The NFB N4(H), NFX N4 series provides 95° of rotation and is provided with a graduated position indicator showing 0° to 95°.
The actuator may be stalled anywhere in its normal rotation without the need of mechanical end switches.
The NFB24-S N4(H), NFX24-S N4 version are provided with two built-in auxiliary switches. These SPDT switches are provided for safety interfacing or signaling, for
example, for fan start-up. The switching function at the fail-safe position is fixed at +10°, the other switch function is adjustable between +10° to +90°.
Power supply 24 VAC ± 20% 50/60Hz 24 VDC +20% / -10%
Power consumption running 6 W / heater 25 W holding 2.5 W
Overload protection electronic throughout 0 to 95° rotation
Torque 90 in-lb [10 Nm] minimum
Mechanical angle of rotation 95° (adjustable with mechanical end stop, 35° to 95°)
Running time motor < 75 seconds; spring 20 seconds @ -4°F to 122°F [-20°C to 50°C];< 60 seconds @ -22°F [-30°C]
Position indication visual indicator, 0° to 95°
Manual override 5 mm hex crank (³/16" Allen), supplied
Housing UL Type 4, NEMA 4, IP66
Housing material polycarbonate
Agency listings † cULus acc. to UL60730-1A/-2-14, CAN/CSA E60730-1:02, CE acc. to 2004/108/EC & 2006/95/EC
Quality standard ISO 9001