A disc filter sector comprising a trapezium tubular support frame, and a trapezium screen frame supporting a screen cloth, the trapezium filter medium element being connected to the trapezium tubular support structure. More particularly, there is a pair of such filter sectors, and the sectors are connected together by an overlying cap.

A fuel filter includes a pair of filter members facing each other and a frame. Outer peripheral edges of the filter members are closed. The frame is housed in the filter members. The frame maintains a gap between the pair of the filter members. The frame extends along a second direction perpendicular to a first direction in which the pair of the filter members face each other. The frame includes a plurality of first frame members and a second frame member. The plurality of the first frame members is disposed at intervals in a third direction perpendicular to the first direction and the second direction. The second frame member extends along the third direction and is connected to each of the first frame members. The flame has a greater strength in the second direction than in the third direction.

A filtration assembly filters diesel fuel used by a diesel engine and includes a filter element disposed within a housing. The housing includes an unfiltered fuel inlet and a filtered fuel outlet. The filter element disposed within the housing receives fuel from the fuel inlet. The filter element defines a peripheral wall sealably engaging filter media defining an unfiltered side and a filtered side of the filter element. The unfiltered side is enclosed with an impermeable barrier affixed to the peripheral wall and the filtered side is enclosed with a permeable water diffuser through which filtered fuel passes. A water separator assembly is disposed externally to the filter element receiving filtered fuel from the water diffuser. The water separator assembly includes water separator media preventing water from passing into the separator. The separator assembly interconnects to the filtered fuel outlet providing filtered, dewatered diesel fuel to the diesel engine.