What is the filtration process involved in fuel oil polishing?

The filtration process in fuel oil polishing involves multiple stages of filtration to remove water, sludge, and particulates from the fuel. Initially, water separators and coalescers are used to remove free and emulsified water. Next, coarse filters trap large particles like dirt and rust, while fine filters remove smaller particulates to ensure that the fuel is clean. Some systems also use centrifugal separators to enhance filtration efficiency. After the fuel has been filtered, it is returned to the storage tank or sent to the engine, ensuring high-quality fuel for reliable operation.