The fuel filter element is used to filter out the sundries in the fuel. The aliases are oil-water separator and diesel fine filter, which are microporous paper filter elements. Fuel filters are all filter filters. In the early days, there were several types of filter elements for gasoline filters, such as metal sheet gap type, metal filter type, nylon cloth type, and porous ceramic type.

The filter element of diesel filter has several types such as cylindrical felt type, nylon cloth type and cotton yarn type. These filter elements have good passing performance and long service life, but they generally have disadvantages such as low filtration efficiency, complex structure, high cost, and inconvenient maintenance, and they have been gradually eliminated.

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