Separators
Most compressed air systems are equipped with oil and moisture separators. The figure provided here illustrates a centrifugal type condensate separator.
Water and oil separators are required to separate free water and oil from compressed air. This is necessary to prevent corrosion, deposit buildup, and water or oil buildup in the piping or service. For example, water will cause rust in piping, wash away lubricants, and plug nozzles. Oil will contaminate many industrial processes and may present an explosion hazard.
Air is directed into these units in a manner that creates a swirling motion. Centrifugal force throws the moisture particles against the wall, from where they drain to the bottom.