Fibrous porous filter elements formed by joining two fibrous porous sections, porous filters comprising the joined sections, filter baskets and filter devices comprising the elements and filters, methods of making the filter elements and filters, and methods of filtration using the filter elements and filters, are disclosed.

Filter media, filter elements, and methods for filtering an gas stream are described herein. In some embodiments, the filter media may comprise a fiber web comprising a plurality of fibers and having a particular oil repellency level. For instance, in certain embodiments, the surface chemistry of the fiber web may be tailored to impart a particular surface energy density that matches the surface energy density of the fluid (e.g., an oil, a lubricant, and/or a cooling agent) being removed from the gas stream. In some embodiments, the fiber web may be wrapped around a core. For example, the fiber web may be wrapped around the core such that it forms two or more layers around the core. In some cases, the fiber web may be perforated. In certain embodiments, an gas stream comprising a fluid (e.g., an oil, a lubricant, and/or a cooling agent) may be passed through the fiber web, filter media, and/or filter element such that at least a portion of the fluid coalesces on the fiber web. Fiber webs, filter media, and/or filter elements as described herein may be particularly well-suited for applications that involve filtering gas streams containing oil, lubricants, and/or cooling agents (e.g., gas streams generated by a compressor) though the media may also be used in other applications. Advantageously, the fiber webs, filter media, and/or filter elements described herein may significantly reduce or prevent fouling of the filter caused by oil or other liquids.

The present disclosure relates to filtration media packs, filter elements, and methods for manufacturing filtration media packs and filter elements. The present disclosure is directed to filtration media packs having alternating first media sheet and second media sheet secured together and forming a first flow face and a second flow face, wherein the first media sheet and the second media sheet provide a first separation or gap therebetween as a result of the presence of a first plurality of protrusions or bosses extending from at least one of the first media sheet or the second media sheet, and a second separation or gap therebetween as a result of a second plurality of protrusions or bosses extending from at least one of the first media sheet or the second media sheet, and the media pack being closed to passage of unfiltered fluid therethrough from the first flow face to the second flow face or from the second flow face to the first flow face without filtering passage through the first media sheet or the second media sheet.

Filter media, filter elements, and methods for filtering an gas stream are described herein. In some embodiments, the filter media may comprise a fiber web comprising a plurality of fibers and having a particular oil repellency level. For instance, in certain embodiments, the surface chemistry of the fiber web may be tailored to impart a particular surface energy density that matches the surface energy density of the fluid (e.g., an oil, a lubricant, and/or a cooling agent) being removed from the gas stream. In some embodiments, the fiber web may be wrapped around a core. For example, the fiber web may be wrapped around the core such that it forms two or more layers around the core. In some cases, the fiber web may be perforated. In certain embodiments, an gas stream comprising a fluid (e.g., an oil, a lubricant, and/or a cooling agent) may be passed through the fiber web, filter media, and/or filter element such that at least a portion of the fluid coalesces on the fiber web. Fiber webs, filter media, and/or filter elements as described herein may be particularly well-suited for applications that involve filtering gas streams containing oil, lubricants, and/or cooling agents (e.g., gas streams generated by a compressor) though the media may also be used in other applications. Advantageously, the fiber webs, filter media, and/or filter elements described herein may significantly reduce or prevent fouling of the filter caused by oil or other liquids.

The invention relates to a filter element (10), including a filter body (12) with a self-contained exterior side (50) which surrounds a self-contained interior side (52), at least one filter medium (16) being disposed between exterior side (50) and interior side (52) and the filter body (12) including at least in some areas at least one winding layer (14) with at least one adsorbent. The invention relates furthermore to a filter system (100) with a filter element (10) with a filter body (12) with a self-contained exterior side (50) which surrounds a self-contained interior side (52), at least one filter medium (16) being disposed between exterior side (50) and interior side (52), the filter body (12) including at least in some areas at least one winding layer (14) with at least one adsorbent.

A filter cartridge is provided for filtering particulates in fluid and gas streams. The filter cartridge has a filter element for filtering the streams and a helical wrap to give stability to the pleats in response to radially outward flow. The wrap has an outer layer for attaching to the filter element and an inner layer for strength and resisting pressure drops across the filter element.

A filter support sheet extruded from a fluoroplastic material includes a base section having spaced-apart ribs extending outwardly from at least one surface thereof. Segments between spaced-apart ribs provide flow channels and apertures are punched through the sheet in a predetermined pattern unaffected by the structure of the support sheet. A method includes the steps of: (1) extruding a thermoplastic, fluoroplastic material to form of a sheet; (2) passing the sheet through a nip region provided by opposed rollers; at least one having an outer surface with counter-sunk grooves. Counter-sunk grooves in one roller are aligned with an outer surface or counter-sunk grooves of the other roller in the nip region to form a ribbed sheet having ribs upstanding from at least one surface of said sheet; (3) setting the ribbed sheet and (4) punching apertures through the ribbed sheet in a predetermined pattern.

A separation component for a filter element has a web-shaped support body with a top rim and a bottom rim. A web-shaped separator body covers a side face of the support body completely or partially. Support body and separator body are wound to a spiral shape with axially successive turns. The support body has a connecting fold at the top rim and at the bottom rim, respectively. The connecting folds engage each other in the axially successive turns of the spiral shape. The separation component can be manufactured by placing a web-shaped separator body onto a web-shaped support body and by winding support body and separator body to a spiral shape. During winding, a connecting fold at a top rim of a turn of the spiral shape and a connecting fold at a bottom rim of an axially successive turn are brought into engagement with each other.

Articles and methods involving filter media are generally provided. In certain embodiments, the filter media includes at least a first layer, a second layer, and an adhesive resin positioned between the first layer and the second layer. In some embodiments, the first layer may be a pre-filter layer or a support layer. The second layer may, for example, comprise fibers formed by a solution spinning process and/or may comprise fine fibers. In some embodiments, the adhesive resin may be present in a relatively low amount and/or may have a low glass transition temperature. The filter media as a whole may have one or more advantageous properties, including one or more of a high stiffness, a high bond strength between the first layer and the second layer, a high gamma, and/or a low increase in air resistance after being subjected to an IPA vapor discharge. The filter media may be, for example, a HEPA filter and/or an ULPA filter.

Filter media, filter elements, and methods for filtering an gas stream are described herein. In some embodiments, the filter media may comprise a fiber web comprising a plurality of fibers and having a particular oil repellency level. For instance, in certain embodiments, the surface chemistry of the fiber web may be tailored to impart a particular surface energy density that matches the surface energy density of the fluid (e.g., an oil, a lubricant, and/or a cooling agent) being removed from the gas stream. In some embodiments, the fiber web may be wrapped around a core. For example, the fiber web may be wrapped around the core such that it forms two or more layers around the core. In some cases, the fiber web may be perforated. In certain embodiments, an gas stream comprising a fluid (e.g., an oil, a lubricant, and/or a cooling agent) may be passed through the fiber web, filter media, and/or filter element such that at least a portion of the fluid coalesces on the fiber web. Fiber webs, filter media, and/or filter elements as described herein may be particularly well-suited for applications that involve filtering gas streams containing oil, lubricants, and/or cooling agents (e.g., gas streams generated by a compressor) though the media may also be used in other applications. Advantageously, the fiber webs, filter media, and/or filter elements described herein may significantly reduce or prevent fouling of the filter caused by oil or other liquids.