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Blauberg KFK 60x35-3

Duct DX cooling unit for rectangular air ducts.
EAN codeEAN4058448041006
  • Description
  • Characteristics
  • Downloads
  • Designation key
  • Dimensions
  • Air pressure losses
  • Calculation diagram

Supply air cooling for ventilation systems in various premises. Suitable for installation into supply or air handling units to provide air cooling.


Galvanized steel casing. The cooling elements are made of copper tubes and aluminum plates. Available in three-coil modifications and rated for operation with R123, R134a, R152a, R404a, R407c, R410a, R507, R12, R22, R32 refrigerants. Polypropylene droplet separator and drain pan for condensate drainage and removal included. Droplet separator operates efficiently at air flow below 4 m/s.

Counter air flow connection   Air flow streamwise connection

Only horizontal mounting by means of flanged connection. Condensate drainage must be provided. Air filter must be installed upstream of the cooling unit to prevent the unit soiling. Mounting position must ensure uniform air flow distribution through the entire cross section. Installation upstream or downstream of the supply fan. The minimum air duct length downstream of the fan must be 1-1.5 m to ensure air flow stabilization. The maximum cooling capacity is attained if the cooling unit is connected on counter-flow basis. The attached charts are valid for counter-flow connection. While mounting the cooling unit provide condensate drainage through the U-trap. The U-trap height must be selected with respect to the total fan pressure, refer to the table and diagram below.

H [mm] K [mm] P [Pa]
100 55 600
200 105 1100
260 140 1400

H: U-trap heightK: drainage heightP: total fan pressure

For a proper and safe operation of the cooling unit it should be connected to a control system for integral control and automatic cooling capacity regulation.

Parameter KFK 60х35-3 Measurement unit
Casing material galvanized steel -
Air duct for rectangular air ducts -
Documents archieve
Documents archieve
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KFK (rectangular) - data sheet (pdf 686.24Kb)
KFK (rectangular) - user's manual (pdf 2.25Mb)
KFK (rectangular) - image (png 547.95Kb)
Designation key
Designation key
Series Flange size (WxH) [cm]   Number of coil rows
KFK 40x20; 50x25; 50x30; 60x30; 60x35; 70x40; 80x50; 90x50 100x50 3

Model Overall dimensions [mm]
Ø D1 Ø D2 B B1 B2 H H1 H2 L
KFK 60x35-3 18 28 600 640 670 350 445 199 44
Air pressure losses
Air pressure losses

Calculation diagram
Calculation diagram

How to use diagrams.Sample parameters: Air flow = 3500 m³/h.The air flow is 3500 m³/h and the air speed in the cooling unit is 4.65 m/s .    
To calculate the coldest air temperature find the intersection point of the air flow line with the rated outer summer temperature shown in blue line (e.g., +30 °С) and draw the line to the left until it crosses the outdoor air humidity curve (e.g. 50 %). From this point draw a vertical line to the supply air temperature downstream of the cooling unit (+22.5 °С) . To calculate the power of the cooling unit find the intersection point of the air flow with the rated summer temperature (e.g., +30 °С) and draw the line to the right until it crosses the air humidity curve (e.g., 50 %). From this point draw a vertical line to the cooling unit power axis (14.5 kW) .   To define the necessary refrigerant flow through the cooling unit drop a perpendicular on the axis which corresponds to refrigerant flow through the cooling unit (310 kg/h). To define refrigerant pressure drop in the cooling unit find the intersection point of line with the pressure drop chart and draw a perpendicular to the right until it crosses the refrigerant pressure axis (24.0 kPa).