FILTRATION MEDIA PACK WITH FLUTED AND FACING SHEET HAVING PROTRUSIONS Russian patent published in 2019 - IPC B01D46/52 B01D27/06 

FIELD: separation.

SUBSTANCE: invention relates to filtration. Filtration media pack comprises a plurality of layers of single face media comprising a fluted sheet, a facing sheet, and a plurality of flutes extending between the fluted sheet and the facing sheet; the first portion of the plurality of flutes being closed to unfiltered air flowing into the first portion of the plurality of flutes, and a second portion of the plurality of flutes being closed to unfiltered air flowing out of the second portion of the plurality of flutes, such that air passing into one of the first face or the second face of the media pack and out the other of the first face or the second face of the media pack passes through media to provide filtration of the air, and wherein at least one of the flutes comprises at least one contact region between the single face media and the fluted sheet, the contact region comprising at least one protrusion extending from at least one of the facing sheet and fluted sheet. Repeating flute structure comprises at least one ridge extending along at least a portion of the length of the flute between adjacent vertices. In one embodiment, the fluted sheet includes a plurality of protrusions in contact with the facing sheet.

EFFECT: technical result: improved cleaning quality.

74 cl, 32 dwg