Belimo Aircontrols (USA), Inc. GKB24-3 Damper Actuator

SKU: GKB243
Unit Price
List Price$1,694.00
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Damp.Rotary, 360in-lb, On/Off/Float, 24V

Actuator TypeElectronic fail-safe
Control TypeFloating/3-point
Electrical Connectioncable
Running time150 seconds
VoltageAC 24�V
Angle of Rotation95�
Direction of Rotation (Fail-Safe)reversible with switch
Direction of Rotation (Motor)reversible with built-in switch
Power Consumption (Holding)3�W
Power Consumption (Running)11 W
Degree of ProtectionNEMA�2, UL�Enclosure�Type�2
Shaft Diameter1/2" to 1.05" round, centers on 3/4" with insert, 1.05" without insert
Torque360 in-lbs [40 Nm]
Safety FunctionYES
Manual Overrideexternal push button
ApplicationFor on/off and fl oating point, fail-safe control of dampers in HVAC systems. Actuator sizing should be done in accordance with the damper manufacturer?s specifi cations. The actuator is mounted directly to a damper shaft up to 1.05? in diameter by means of its universal clamp. The actuator is mounted directly to a damper shaft up to 1.05? in diameter by a universal clamp. A crank arm and several mounting brackets are available for applications where actuator cannot be direct coupled to the damper shaft. Control is fl oating point from a triac or relay, or On/Off from an auxiliary contact from a fan motor contactor, controller or manual switch.
Weight3.85 lbs [1.75 kg]
Servicingmaintenance free
Power Supply24VAC �20% 50/60Hz
Electrical Connection18 GA plenum rated cable �" conduit connector protected NEMA 2 (IP54) 3 ft [1m] 10 ft [3m] 16 ft [5m]
Overload Protectionelectronic throughout 0 to 95 rotation
Input Impedance1500 �
Angle of Rotationmax. 95�, adjustable with mechanical stop electronically variable
Manual Overrideexternal push button
HousingNEMA2, IP54, UL enclosure type 2
Quality StandardISO 9001
Position Indicationrefl ective visual indicator (snap-on
Feedback Output U2 to 10VDC, 0.5mA max, VDC variable
Housing MaterialUL94-5VA
Ambient temperature-22�F to +122�F [-30�C to +50�C]
Noise level< 45dB(A)
Humidity5 to 95% RH non-condensing (EN 60730-1)
Direction of Rotationreversible with switch
Torque360 in-lb [40 Nm]
Bridge Time2 second delay before fail-safe activates
Storage temperature40�F to +176�F [-40�C to +80�C]
Power consumption12W (3W)
Fail-Safe Positionadjustable with dial, 0 to 1 in 10� increments
Operation range Yon/off, fl oating point
Running time normal operation fail-saf150 seconds (default), variable 90 to 150 seconds 35 second
Agency listcULus acc. to UL 60730-1A/-2-14 CAN/CSA E60730-1:02 CE acc. to 2004/108/EC and 2006/95/EC
n 12W (3W) Transformer sizing21VA (class 2 power source)
nitial charge5 to 20 seconds
S1A, S2AAuxiliary Switch(es)
P...AFeedback Potentiometers
ZS-100Weather Shield - Steel
ZS-150Weather Shield - Polycarbonate
ZS-260Explosion Proof Housing
ZG-JSA (-1, 2,3)Jackshaft Adaptors for Hollow Jackshafts
ZS-300 (-1) (-5)NEMA 4X Housing
PS-100Actuator Power Supply Simulator
P370Shaft Mount Auxiliary Switch
K-GM20?" [20mm] Shaft Clamp
ZG-102Multiple Actuator Mounting Bracket
TOOL-0713 mm Wrench
ZG-GMACrank arm Adaptor Kit
OperationThe GK..24-3 actuator provides 95� of rotation and a visual indicator shows the position of the actuator. When reaching the damper or actuator end position, the actuator automatically stops. The gear can be manually disengaged by pressing the button located on the actuator cover. The GK..24-3 actuators use a brushless DC motor, which is controlled by an Application Specifi c Integrated Circuit (ASIC). The ASIC monitors and controls the actuators rotation and provides a digital rotation sensing (DRS) function to prevent damage to the actuator in a stall condition. Power consumption is reduced in a holding mode. The actuator is electronically protected against overload. The anti-rotation strap supplied with the actuator will prevent lateral movement. Add-on auxiliary switches or feedback potentiometers are easily fastened directly onto the actuator body for signaling and switching functions.
Typical SpecificationOn/off, fl oating point control damper actuators shall be electronic directcoupled type, which require no crank arm and linkage and be capable of direct mounting to shaft up to 1.05" diameter. Actuators shall have brushless DC motor technology and be protected from overload at all angles of rotation. Actuators shall have reversing switch and manual override on the cover. Run time shall be constant and independent of torque. Actuators shall be cULus listed, have a 5-year warranty, and be manufactured under ISO 9001 International Quality Control Standards. Actuators shall be as manufactured by Belimo.

Product Family

Model NumberDecriptionManufacturerPriceAvail. Qty 
GKB243 Damper Actuator Belimo Aircontrols (USA), Inc. $762.30 10    Add To Cart

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