VENTS OKF 900x500-3
- Additional diagrams
Direct-expansion duct coolers are designed for cooling of supply air in rectangular ventilation systems and can be used either for supply or supply and exhaust units.
The DX coolers are available in OKF and OKF1 mofications. The OKF1 cooler has a simplified design. The cooler casing is made of galvanized sheet steel, the piping is made of copper tubes and the heat exhange surface is made of aluminium plates. The coolers are available in 3 rows modification and designed for operation with R123, R134а, R152а, R404а, R407с, R410а, R507, R12, R22 cooling agents. It is equipped with a droplet separator and a drain pan for condensate collection and removal.
For OKF and OKF1 models by default the service side is located on the right side from the air stream direction.
The OKF cooler service side location can be changed by coil turning by 180°. The OKF1 modification does not have this option.
Н - U-trap height
К - drain height
Р - total pressure in the fan
|Counter flow connection||Parallel flow connection|
Air pressure losses in freon coolers
Rectangular OKF series
|Casing material||оцинкованная сталь||-|
|Rectangular duct size||900х500||mm|
How to use freon cooler diagrams:
Air Speed. Starting from 7000 m3/h on the air flow scale draw a vertical line 1 till the air speed axis. It makes 4.4 m/s.
- Supply air temperature. Prolong the line 1 up to the point where it crosses the outside air temperature (e.g. +30°C); then draw a horizontal line 2 from this point to the left till crossing the outside air humidity (e.g. 50%). From this point draw a vertical line 3 to the supply air temperature at cooler outlet axis on top of the graphic (+20.7°C).
- Cooling coil capacity. Prolong the line 1 up to the point where it crosses the outside air temperature (e.g. +30°C) and draw a horizontal line 4 from this point to the right until it crosses the outside air humidity curve (e.g., 50%), from here draw a vertical line 5 up to the scale representing the cooling capacity (28.0 kW).
- Cooling agent discharge. Prolong the line 5 down to cooling agent discharge axis at the bottom of the graphic 6 (640 kg/hour).
- Cooling agent pressure drop. Draw the line 7 from the point where the line 6 crosses the black curve to the pressure drop axis (26.0 kPa).
|Series||Flange designation (WxH) [mm]||Number of cooling coils|
||400х200; 500х250; 500х300; 600х300; 600х350; 700х400; 800х500; 900х500; 1000х500||3|