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Separator testing

Testing separators allows to define the nominal size and the class of light liquids (oil, petrol) and grease separators.

To perform this test, a standardized mixture of water and hydrocarbons is introduced in the separator during a given time, after which the residual rate of hydrocarbons will be measured. This kind of test is applied on separators where light liquid/grease is separated from water by means of gravity and/or coalescence.

In the case of light liquid separators, the nominal size is the maximum acceptable flow rate of wastewater in l/s that can guarantee a release whereby the flow rate of hydrocarbons should not exceed 5mg/l for a class I separator and 100 mg/l for a class II separator.

In the case of grease separators, the basic dimensions correspond to the maximum acceptable flow rate in l/s that can guarantee a release whereby the hydrocarbons flow rate does not exceed 25 mg/l.

The tests are performed according to these standards:

  • EN 858 for light liquid separators
  • EN 1825 for grease separators

Limits of our test bench:

-          Maximal water flow rate: 30 l/s



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