Cyclone

The cyclone is a separator device that uses centrifugal force to remove solids and liquids from gases. Hydrocyclones are used for separating solids from a fluid. By tangential injection of the pressurised, contaminated liquid into the rotationally symmetric chamber of the cyclone, a centrifugal force field is created.

This causes heavy particles to gather near the outer wall, from where they are extracted downwards via a narrow, funnel-shaped opening. The cleaned liquid can then be removed upwards from the centre of the cyclone. See Fig. 1 Cyclone

Cyclones are used in centrifugal pumps to clean lightly contaminated fluids handled without great cost, for use as bearing lubricant (e. g. plain bearing)  or as barrier fluid for seals (e. g. shaft seals).