What methods are used for the removal of contaminants from gear oil?

Methods include:

Filtration: Removing solid particles using filters of various micron ratings.
Centrifugation: Separating contaminants based on density differences.
Vacuum Dehydration: Eliminating water and gases under reduced pressure.
Coalescing Filters: Aggregating water droplets for easier removal.
Magnetic Separation: Extracting ferrous metal particles using magnets.
Adsorption: Using materials to absorb dissolved contaminants.
Combining these methods enhances purification effectiveness