| Collection |
| The filter media (such as a mesh screen, drum, or cartridge) captures contaminants from the fluid as it passes through. |
| Coalescence: |
| The filter media encourages the smaller droplets to merge or coalesce into larger droplets. This is typically facilitated by the filter's fine fibers or media, which provide a surface for the droplets to contact and merge. |
| Separation |
| Once the droplets have coalesced into larger sizes, they separate from the fluid stream due to gravity or centrifugal forces. In liquid-liquid separation, the larger droplets settle out of the stream due to density differences. |
| Discharge |
| The separated impurities or droplets are collected and removed, while the clean fluid exits the coalescer. |






