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NKQ Series (54 in-lb)
Damp.Rotary(EFS), 54in-lb, On/Off, 24V
Unit of Measure


Product Type

N/A Damper Actuator

Actuator Type

N/A Electronic Fail-Safe

Object name

N/A NKQB24-1


N/A NKQB24-1

Application Type

N/A Air


N/A Electronic Fail-Safe


N/A minimum 54 in·lbminimum 6 N·m

Control Type

N/A On/Off

Control Input

N/A On/Off

Input Impedance

N/A 1000 Ω

Position Feedback

N/A No Feedback

Running Time (Motor)

N/A 4 seconds constant, independent of load

Running Time (Fail-Safe)

N/A 4 seconds

Power Supply

N/A 24 VAC ±20%, 50/60 Hz, 24 VDC ±10%

Power Consumption

N/A running: 11 W, holding: 3.0 W

Transformer Sizing

N/A 22 VA (class 2 power source)

Electrical Connection

N/A 3 ft, 18 GA plenum rated cable with 1/2" conduit connector

Overload Protection

N/A Electronic throughout 0º to 95º rotation

Shaft Diameter

N/A Standard: 1/2" to 1.05" round, centers on 1/2" and 3/4" with insert, 1.05 without insert

Angle of Rotation

N/A max. 95º, adjustable with mechanical stop

Direction of Rotation (Motor)

N/A reversible with switch

Direction of Rotation (Fail-Safe)

N/A Reversible with switch

Position Indication

N/A Reflective visual indicator (snap on)

Manual Override

N/A External push button


N/A Max. 95% RH non-condensing

Ambient Temperature

N/A -22 to +122 ºF-30 to +50 ºC

Ambient Temperature (safety)

N/A -22 to 122 ºF-30 to 50 ºC

Storage Temperature

N/A -40 to +176 ºF-40 to +80 ºC

Noise Level

N/A max. 60 dB (A)


N/A NEMA 2, IP54, UL Enclosure Type 2

Agency Listing

N/A cULus acc. to UL60730-1A/-2-14, CAN/CSA E60730-1:02, CE acc. to 2004/108/EEC and 2006/95/EC


N/A Maintenance Free

Quality Standards

N/A ISO 9001


N/A 2.9 lb1.10 kg


N/A For proportional modulation of dampers in HVAC systems.
The NKQB24-1 and NKQX24-1 provide electrical power off operation for reliable fail-safe operation.
The actuator is mounted directly to a damper shaft up to 1.05" in diameter. A crank arm and several mounting brackets are available for applications where actuator cannot be direct coupled to the damper shaft.