How does a diesel fuel oil polishing system work?

A diesel fuel oil polishing system works by circulating diesel fuel through a series of filters and separators to remove contaminants such as water, sludge, and particulates. The system uses water separators to remove free water and coalescers to handle emulsified water, followed by fine filters to trap solid impurities. The cleaned diesel is then returned to the tank or used in engines, ensuring optimal performance.