Hydrocyclone operates under system pressure, and use pressure drop as the primary source of energy.
The liquid in a hydrocyclone is fed tangentially to initiate a high radial velocity. The spinning motion of the fluid is accelerated by the tapered shape of the hydrocyclone liner, and the spinning motion creates a centrifugal force up to 4,000 G´s which causes the oil and water to separate rapidly.
The oil forms a core at the axis of the hydrocyclone and is forced out via a centered opening at the inlet end of the hydrocyclone liner.
It is simple and compact oil/water separator with no moving parts.