Actuators and Dampers

NKQ Series

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NKQ Series

Fast-acting fail safe actuators NKQ Series

Fast-acting fail safe actuators


The Belimo NKQ Series actuators are electronic, fail safe, fast acting actuators. They are designed to deliver a 4 to 10 second (4 second is standard) fail safe return. They are not spring return, but rather they are driven by a super capacitor which allows a very fast return to the normal or fail safe position desired. The basic models come in both ON/OFF and 2-10VDC options. Auxillary switches and feedback options are available on the NKQB24-1 model. The NKQB24-SR comes with a feedback of 2-10 VDC standard and the auxillary switch is an optional add-on. For more customized control, the NKQx-MFT models can be custom ordered based on the options available.


(Wholesale customers, log in for your special pricing)

QtyModelDescriptionIn StockList PriceInternet Price
NKQB24-SR ACT/FAILSAFE/54IN-LB(6NM)/24VAC/DC/2-10VDC/4SECIn Stock984.00551.04
NKQX24-MFT ACT/FAILSAFE/54IN-LB(6NM)/24VAC/DC/MFT/4SE/2-10VDCIn Stock1,064.00595.84
NKQX24-MFT-C ACT/FAILSAFE/54IN-LB(6NM)/24VAC/DC/MFT/4SECIn Stock1,122.00628.32


No accessories found
  • Standard 4 second drive time
  • Standard 1/2″ to 1.05″ clamp
  • 3' plenum rated cable with conduit connnector
  • 24VAC/DC power supply
  • Direct coupled
  • 5 year warranty

Supply Voltage:24 VAC ±20% @ 11 VA, 50/60 Hz; 24 VDC ±10% @ 458 mA

Control Signal:On-Off, Proportional

Input Impedance:100 kΩ

Motor: Brushless DC

Conduit Connection:3 ft (0.91 m), 18GA appliance cable, 1/2" (1.27 cm) conduit connection

Switch Type:Add-on SPDT

Shaft:Direct mount

Actuator Bracket:Universal clamp

Operating Torque:54 in-lb

Frame:Plastic / aluminum

Linkage:Damper acessories

Torque:54 in-lb

Action:Shaft rotation

Rotation:95 degrees

Drive Time:4 seconds

Spring Return Time:< 4 seconds

Noise:≤ 56.5 dB (A)

Resolution:± 5%

Life Expectancy:100,000+ cycles

Operating Temperature:-22 to 122℉ (-30 to 50℃)

Operating Humidity:5-95% RH non-condensing

Maximum Shaft Diameter:1.05″ (2.67 cm)

Minimum Shaft Length:0.5″ to 1.05″ (1.27 to 2.67 cm)


Available Options:18 or 16 ft cable (5.49 or 4.88 m), 16 or 10 ft cable (4.88 or 3.05 m)

Enclosure Rating:NEMA2 / IP54 UL enclosure type 2

Dimensions:7.25″W x 3.9″H x 3.0″L (18.42 x 9.91 x 7.62 cm)

Approvals:CSA, CE

Warranty:5 years


Download Additional Data

document   NKQ Series Catalog Page
document   NKQ Series Datasheet