Ring-shaped filter

摘要

A ring-shaped filter is made from a piece of filter material formed esp. from fan-folded fleece. The edges are closed by a pliable sealing material, which projects beyond the circular filter material radially inwards or outwards and by means of which the overhanging seal rests on the pipe edge forming an axial seal against the filter housing. The pipe end face projects beyond the level of the filter insert margins, by means of which the pliable seal material provides an axial seal between the pipe end and the housing accommodating the filter insert.