Patent ID: 8758467

Claim:
A filter cartridge for use in separating a hydrophobic liquid aerosol phase from a gas stream and for use in filtering the gas stream; the filter cartridge comprising: (a) a media pack comprising filtration media surrounding an open interior and including first and second, opposite, ends; (b) a first end piece adjacent the first end of the media pack; the first end piece having a first, outer, end surface on an opposite side of the first end piece from the media pack; (i) the first end piece including a perimeter housing seal arrangement thereon; the perimeter housing seal arrangement comprising a seal member configured to form a larger perimeter than the media pack and configured to form a releasable seal with a housing, when the filter cartridge is installed in a housing, for use; (ii) the first end piece including a central flow aperture arrangement projecting therethrough in communication with the open interior of the media pack; and (iii) the first end piece including a non-circular projection positioned around the central flow aperture arrangement and projecting from the first end piece in a direction axially opposite the media pack; the non-circular projection being positioned spaced from an outer perimeter of the first end piece.