In lubrication system filtration, which statement correctly distinguishes a purifier from a filter?

In lubrication system filtration, which statement correctly distinguishes a purifier from a filter?

• A. The purifier removes water and impurities from oil using centrifugal separation; filters remove solids.
• B. The purifier removes water from oil; filters remove water as well.
• C. The purifier removes solids; filters remove water and oil.
• D. Filters remove solids; purifiers remove liquids.

Answer: (C)

In lubrication system filtration, the key difference lies in how separation is achieved. A purifier uses centrifugal forces to separate immiscible liquids and solids from oil: the denser water droplets and solid particles are driven outward and removed, while the cleaner oil remains. This makes purifiers effective at removing both water and entrained impurities from the oil. Filtration, on the other hand, relies on a porous media to physically trap solid particles as oil passes through. It is designed to remove solids, not to separate water from oil. So the purifier’s role is to remove water and impurities by density-based separation, while the filter’s role is to remove solids by filtration.

In lubrication system filtration, the key difference lies in how separation is achieved. A purifier uses centrifugal forces to separate immiscible liquids and solids from oil: the denser water droplets and solid particles are driven outward and removed, while the cleaner oil remains. This makes purifiers effective at removing both water and entrained impurities from the oil.

Filtration, on the other hand, relies on a porous media to physically trap solid particles as oil passes through. It is designed to remove solids, not to separate water from oil. So the purifier’s role is to remove water and impurities by density-based separation, while the filter’s role is to remove solids by filtration.