There also exist folding fuel filters. Design of filtering elements of fuel filters is similar with oil filters. They have reliable and strong construction taking heavy loads that are produced by pressure and temperature difference. The filtering element has bottom and rod made of perforated metal plate. Such construction is applied in engines of old generation and contradicts present eco standards.

Filtering elements of present-day designs are produced in accordance with ECO technologies eliminating application of the metal parts. All metal parts are replaced by plastic ones, which are steady against aggressive fuel impact. Such construction allows to carry out easy utilization. Used elements are simply burnt out at incinerator plant as they do not require separating of metal parts. There also can be found fuel filters filtering elements, which are made of special synthetic nonwoven materials and which are intended mostly for preliminary purification of fuel.

If system has two levels of fuel purification, than firstly fuel goes thought described above element of preliminary purification. After the fuel is liable to fine cleaning by means of filtering elements made of especially impregnated filtering paper.