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Oil/Water Separators

Oil/water separators are used for non-emulsified condensates that can be separated. The oily contaminants in the condensate may not be permanently dissolved in the water (emulsified) and need to have a lower density than water.

A simple test can be used to determine whether the condensate can be separated and treated in an oil/water separator: Take a glass of condensate and wait for 24 hours. If, after this time, the oil has clearly moved to the top and the lower part of the glass is clear, the condensate can be treated by using an oil/water separator without problems.

Emulsified condensates that cannot be separated require a specific oil/water separator design or the use of emulsion separators.

Maximal volume flow
108 – 6.000 m³/h
G ½
Maximal volume flow
120 – 3.600 m³/h
G ½

Versions for higher volume flows on request.

Schematic Configuration

Oil/water separators reduce the contamination of condensate to specified limit values. They consist of a multi-chamber system, which is used for treating the condensate in stages.

1 Vent chamber with condensate inlet
The condensate, which may still be under light residual pressure, is discharged to the vent chamber and then fully depressurized to atmospheric pressure. An activated carbon filter is used in order to remove odors from the discharged air.

2 Sedimentation stage with oil outlet
In the sedimentation stage, the condensate "rests". Heavy contamination particles drop down; large oil droplets rise to the top and form an oil layer on the surface. This oil layer is discharged from the oil/water separator via the oil outlet.

3 Oil storage filter
The oil storage filter is used to remove small, non-floating oil droplets from the condensate. The storage filter consists of finely-structured, oil attracting (oleophilic) material. The small oil droplets adhere to the surface and are therefore stored in the filter.

4 Activated carbon filter with water outlet
The activated carbon filter is used to remove residual amounts of dissolved hydrocarbons from the condensate. Purification by means of activated carbon is the final step of condensate treatment. The final product ("dischargeable water") can now be discharged from the oil/water separator to the waste water system. A condensate sample can be taken from the activated carbon filter via a sample valve. This allows the saturation level to be determined and the sample will indicate when the activated carbon needs to be replaced.

Oil/water separators do not require intrinsic energy. The condensate moves through the oil/water separator due to the different heights of the individual chambers. In modern oil/water separators the individual chambers are united in one compact unit.