Abstract: The present invention relates to a filter assembly comprising at least one media pack arranged in a frame structure in which the at least one media packs is pleated and having opposing first and second open ends, and a corresponding method for manufacturing such a filter assembly for removing particles from an air stream. The method for manufacturing a filter assembly for removing particles from an air stream said comprises for each media pack sealing the first and second open ends in a first molding step, thereby providing a sealed first edge and a sealed second edge of each respective media pack, and subsequently arranging the at least one media pack in the frame structure and in a second molding step securing and sealing the sealed first edge and the sealed second edge, respectively, to at least one frame element of the frame structure.

Abstract: The present invention relates to a filter frame for receiving a media pack, the filter frame comprising a front plate, and first and second gable plates arranged at opposite ends of the front plate. The front plate comprises a groove at each of the ends and a front edge portion of each gable plate is received in a respective one of the grooves. Each gable plate comprises a retainment member arranged at the front edge portion, which retainment member has been engaged with a complementary retainment member of the front plate. The invention also relates to a filter assembly and a method for assembling a filter frame.

Abstract: A filter unit for removing particles from an air or gas flow, comprising a filter body having a front side, a rear side, and an edge side between the front side and the rear side, and an edge strip arranged on the edge side, which edge strip extends at least the height of the edge side and at least the length of the edge side, wherein the edge strip comprises a foamed thermoplastic material, which is molded to the edge side of the filter body such that the edge strip thereby is formed and fastened directly to the edge side of the filter body, and such that the edge is embedded in the edge strip.

Abstract: An air intake includes an air channel for an air stream passing through the air intake into the plant, and a particle filter assembly arranged in the air channel for removing particles from an air stream passing through the air channel, the particle filter assembly including a front and a back filter unit. The front filter unit is arranged before and in series with the back filter unit such that an air stream passing through the air channel passes through the front filter unit before passing through the back filter unit. The front filter unit is removable and replaceable by a fresh front filter unit while the back filter unit remains in the air channel and while an air stream is passing through the air channel during operation of the plant. The front filter unit has at least equal efficiency and dust holding capacity as the back filter unit.

Abstract: A filter media is disclosed for removing particles from an air stream. The filter media, in an embodiment, includes a porous membrane layer and a pre-filter layer including a downstream surface and an upstream surface. The pre-filter layer is arranged with the downstream surface adjacent an upstream side of the porous membrane layer. The pre-filter layer includes a wet laid composite media having a mixture of glass fibers and synthetic fibers. A method for using the filter media in a gas turbine is also disclosed.

Abstract: The present invention provides regenerable pleated media and filter elements and combinations thereof for use in a clean room environment for removal of airborne molecular contamination. Disclosed is a pleated filter media for a clean room environment wherein the pleated filter media comprises at least an adsorbent first layer of activated carbon or polymer wherein said activated carbon or polymer together with fibers and/or an adhesion agent is enclosed between two second layers of non woven with a grid positioned on at least one side of either of the second layers or incorporated in the first layer for preventing deformation of the pleated filter media when regenerated by a heated air flow above 100° C. at 1 atm.

Abstract: A filter unit comprising a filter bag for removing particles from an air or gas flow, wherein the filter unit is arranged to receive at least one filter pocket and the filter bag comprises an opening portion and an end portion opposite said opening portion. The filter unit further comprises a frame arranged at a periphery of the opening portion, and a support structure arranged at the periphery of the end portion for stretching an area of the end portion. The frame and the support structure act to stretch the filter bag into a substantially parallelepiped shape such that the filter unit is arranged to provide a free passage for the at least one 140 filter pocket into and out of said filter bag. Furthermore, the filter unit is arranged to fold between the frame and the support structure into a folded state.

Abstract: The present invention relates to an air filter pack frame constituted of four profiled elements being held together by angle pieces and surrounding an opening there between, in which a pack of pleated filter medium is intended to be mounted, said profiled elements having a front side, which when a pack of filter medium is mounted in the frame is adjacent to an inlet side thereof, and a rear side, which when a pack of filter medium is mounted in the frame is adjacent to an outlet side thereof. According to the invention an inwardly open sealing channel extends along each profiled elements in the front end thereof.

Abstract: A filter unit for removing particles from an air or gas flow, comprising a filter body having a front side, a rear side, and an edge side between the front side and the rear side, and an edge strip arranged on the edge side, which edge strip extends at least the height of the edge side and at least the length of the edge side, wherein the edge strip comprises a foamed thermoplastic material, which is molded to the edge side of the filter body such that the edge strip thereby is formed and fastened directly to the edge side of the filter body, and such that the edge is embedded in the edge strip.

Abstract: An air intake includes an air channel for an air stream passing through the air intake into the plant, and a particle filter assembly arranged in the air channel for removing particles from an air stream passing through the air channel, the particle filter assembly including a front and a back filter unit. The front filter unit is arranged before and in series with the back filter unit such that an air stream passing through the air channel passes through the front filter unit before passing through the back filter unit. The front filter unit is removable and replaceable by a fresh front filter unit while the back filter unit remains in the air channel and while an air stream is passing through the air channel during operation of the plant. The front filter unit has at least equal efficiency and dust holding capacity as the back filter unit.

Abstract: The present invention provides regenerable pleated media and filter elements and combinations thereof for use in a clean room environment for removal of airborne molecular contamination. Disclosed is a pleated filter media for a clean room environment wherein the pleated filter media comprises at least an adsorbent first layer of activated carbon or polymer wherein said activated carbon or polymer together with fibers and/or an adhesion agent is enclosed between two second layers of non woven with a grid positioned on at least one side of either of the second layers or incorporated in the first layer for preventing deformation of the pleated filter media when regenerated by a heated air flow above 100° C. at 1 atm.

Abstract: The invention relates to a ventilation system for a building (2) including an inlet (4) for outside air. According to the invention a filter housing (7) is located outside the building (2) and the outlet (13) from the filter housing (7) is connected to said inlet (4) for outside air.

Abstract: The present invention relates to an air filter pack frame constituted of four profiled elements being held together by angle pieces and surrounding an opening there between, in which a pack of pleated filter medium is intended to be mounted, said profiled elements having a front side, which when a pack of filter medium is mounted in the frame is adjacent to an inlet side thereof, and a rear side, which when a pack of filter medium is mounted in the frame is adjacent to an outlet side thereof. According to the invention an inwardly open sealing channel extends along each profiled elements in the front end thereof.

Abstract: The invention relates to a pleated filter medium (1) having pleats (2) with rectangular sides and a length direction (L) parallel to the fold between the two sides of a pleat (2), comprising several rows of distance elements extending in a cross direction (C) relative to the folds in the pleated filter medium, said rows being distanced from each other along a length direction (L), whereby each row of distance elements is constituted of a line of glue elements (3) distanced from each other and applied to a side of the filter medium. According to the invention rows of glue elements (3, 4) are applied to both the inside and the outside of the filter medium, the rows on the inside being displaced in the length direction in relation to the rows on the outside. The invention also relates to a filter including such a filter medium.

Abstract: An air filter housing (1) has at least one filter chamber (2, 3) with an inlet end and an outlet end for air passing through a filter unit (F) disposed in the filter chamber, an access opening (4, 5) arranged in a sidewall of the filter chamber for the introduction of an air filter unit into and removal thereof out of the filter chamber, and a clamping device (8) for pressing an air filter unit disposed in the filter chamber against an end wall of the filter chamber in the inlet end thereof. The housing has a guide (19, 20, 21-24) for guiding an air filter unit (F) during introduction into and removal out of the filter chamber (2).

Abstract: A pocket filter assembly includes a frame structure having a plurality of filter pocket openings and a corresponding plurality of filter pockets, each filter pocket having a pocket mouth securely sealed in a corresponding filter pocket opening. The frame structure includes an outer subframe and a corresponding inner subframe connected and locked to each other by means of locking elements at locking positions distributed along opening portions of the subframes defining the filter pocket openings. At each locking position, the filter pocket mouths are sealed clamped and sealed between co-operating opening portions of the subframes. The locking elements include an undercut hook-shaped projection on the inner subframe and a co-operating receiving hole on the outer subframe, such that an interlock of the subframes to each other is obtained, while including filter pocket mouth material of the associated filter pocket between said projection and said aperture such that said interlock is sealed thereby.

Abstract: Embodiments of the invention generally include a filter assembly having a media pack having a single web of pleated media having at least two mini-pleated regions arranged in non-linear orientation. In one embodiment, a filter assembly includes a media pack defined by a single web of media, and an adhesive layer coupling a flat end of the media pack to a frame assembly to form a lap joint. In another embodiment, a filter assembly includes a media pack sealed to a frame assembly. A discontinuous layer of adhesive couples at least one edge of the media pack to the frame assembly.

Abstract: Embodiments of the invention generally include a filter assembly having a media pack having a single web of pleated media having at least two mini-pleated regions arranged in non-linear orientation. In one embodiment, a filter assembly includes a media pack defined by a single web of media, and an adhesive layer coupling a flat end of the media pack to a frame assembly to form a lap joint. In another embodiment, a filter assembly includes a media pack sealed to a frame assembly. A discontinuous layer of adhesive couples at least one edge of the media pack to the frame assembly.

Abstract: Embodiments of the invention generally include a filter assembly having a media pack having a single web of pleated media having at least two mini-seated regions arranged in non-linear orientation. In one embodiment, a filter assembly includes a media pack defined by a single web of media, and an adhesive layer coupling a flat end of the media pack to a frame assembly to from a lap joint. In another embodiment, a filter assembly includes a media pack sealed to a frame assembly. A discontinuous layer of adhesive couples at least one edge of the media pack to the frame assembly.

Abstract: A cleanable filter for particulate material, includes a zigzag pleated filter pack, spacers disposed between the pleats in the filter pack and a frame having an upper and lower part covering the respective upper and lower side of the filter pack that contains the ends of the fold lines and two lateral parts covering the opposite sides of the filter pack that contains the ends of the filter medium zigzag folded into a filter pack, the frame thereby leaving the opposite sides of the filter pack that contains alternate fold lines of the pleated filter pack, free for the passage of air. The filter medium in the filter pack includes a pleated sheet of polytetrafluorethylene and the spacers between the pleats consist of corrugated aluminum foils. An earthing element furthermore electrically connects the aluminum foils to each other and to an earth connection on the outside of the filter frame.