Filter media comprising a pre-filter layer and related components, systems, and methods associated therewith are provided. In some embodiments, the pre-filter layer may be designed to impart desirable properties to the filter media, such as a high gamma and/or long service life, while having relatively minimal or no adverse effects on another property of the filter media that is important for a given application. For instance, a pre-filter layer may be used to improve the upstream removal of fine particulate matter, which may clog a downstream efficiency layer comprising submicron fibers and reduce filtration performance. The pre-filter layer may be configured to increase service life and/or increase the gamma of the filter media. Filter media, as described herein, may be particularly well-suited for applications that involve filtering air, though the media may also be used in other applications.

A filter element for filtration of an air stream includes: a folded filter medium forming a bellows, the filter medium being constructed at least in two layers and having a particle filter layer, an electrically conductive filter layer, and at least one edge band, the at least one edge band being connected to at least one outer side of the bellows. At least one further edge band is connected to an outer side of the bellows. The at least one further edge band is electrically conductive. The at least one further edge band forms a pocket open towards one side.

A filter medium includes first and second porous films mainly containing fluororesin, and a pre-collection member upstream of the first film. The second film is downstream of the first film. The pre-collection member has a pressure drop when air is passed through at a flow rate of 5.3 cm/s of between 15 Pa and 55 Pa, a collection efficiency of NaCl particles having a particle diameter of 0.3 μm when air containing the particles is passed hrough at a flow rate of 5.3 cm/s of between 25% and 80%, a thickness of 0.4 mm or less, and a PF value between 7 and 15. The PF value={−log((100−collection efficiency (%))/100)}/(pressure drop (Pa)/1000). A ratio of the PF value of the pre-collection member to the PF value when the first and second films are overlapped, is between 0.20 and 0.45. The filter medium can be used in a filter pack or filter unit, and may be produced by integrating the first and second films and the pre-collection member using heat lamination.

A filter element includes a media pack and a gasket member. The gasket member includes first and second gasket regions separated by a channel. The elements are usable in a dust collector having a dirty air inlet, a clean air outlet, and a tubesheet dividing between an unfiltered and a clean air volume. An element is removably mounted and sealed within the tube sheet. At least one projection angled relative to a plane of the tube sheet extends into the channel of the gasket member. A method of servicing a dust collector includes removing a first filter element from the tube sheet in the housing, and then sealing a second filter element against the tube sheet by orienting at least one projection extending from a plane of the tube sheet into a channel defined by a gasket member secured to the second filter element. An axial force is exerted to form a seal between the gasket member and the tube sheet.

The present invention relates to a particle filter (F) for a glass forming machine operating according to a blow-and-blow process or according to a press-and-blow process, said particle filter (F) is adapted for placing in at least an air channel (14a) serving pressurized air for counter blow (5) of a parison (P) in a blank mold (2) forming station of said glass forming machine, and/or an air channel (14b, 20) serving pressurized air for final blow (11) and/or for finish cooling (21) of a glass container (12) made of said parison (P) in a finish mold (8) station of said glass forming machine, said particle filter (F) comprising a surface filter as a main filter media (MF) and said particle filter (F), if placed in at least said air channel (14a) serving pressurized air for counter blow (5) of said parison (P) in said blank mold (2) forming station of said glass forming machine, and/or said air channel (14b, 20) serving pressurized air for final blow (11) and/or for finish cooling (21) of said glass container made of said parison (P) in said finish mold (8) station of said glass forming machine, avoiding passage of particles above a certain size from a dirty side of said main filter media (MF) to a clean side of said main filter media (MF) and thus, also avoiding final passage of said particles above said certain size into said parison (P) or said glass container (12) blown by said glass forming machine and a plunger unit (PU), a blow head (BH), a blow head support and a glass forming machine adapted for a particle filter (F) according to the present invention.

Filter media including a waved filtration layer are described herein. The filtration layer may be held in a waved configuration by a support layer. In some cases, the filtration layer may have a combination of characteristics (e.g., mean flow pore size, basis weight, amongst others) that can lead to enhanced filtration performance (e.g., reduced air permeability decrease), in particular, in high humidity environments. The filter media may be used to form a variety of filter elements for use in various applications. In some embodiments, at least a surface of the filtration layer is hydrophilic.

Provided herein are filter media structures having antimicrobial and/or antiviral properties. In particular, the present disclosure describes filter media structures having a first layer with an electret web and a second layer that demonstrates biological-reducing properties. In some cases, the first layer is formed from polypropylene (e.g., spunbond) and the second layer is formed from a plurality of fibers of a polyamide composition (e.g., meltblown).

Disclosed is an air filter using high density filter paper. The filter paper may include a thermally bonded non-woven fabric filter paper 10 having air permeability to filter foreign materials of passed polluted air and change the polluted air to fresh air. The non-woven fabric filter paper includes wrinkled portions 10-1 and 10-N that are folded at a predetermined interval. A thickness of the wrinkle portions 10-1 and 10-N are provided with dense layers 15 and 17 comprising a first polyethylene terephthalate (PET) fiber 20-2 that can shrink by heat and a second polyethylene terephthalate (PET) fiber 20-1 that deforms upon by heat treatment.

A filter element may include a primary layer of filter media defining a chamber having an open end and a closed end distally opposite the open end, and at least one secondary layer of filter media adjacently fixed to the primary layer of filter media. The at least one secondary layer of filter media may be located at the closed end of the primary layer of filter media for increasing a pressure drop at the closed end, such that fluid flow is homogeneously distributed through the chamber in response to the pressure drop. The primary layer of filter media is formed of a non-compressible material and may be tapered to further controlling pressure drops through the chamber. A pocket filter assembly may include one or more filter elements disposed within a housing.

An integral canister filter having multiple layers, including a prefiltration layer. The prefiltration layer may filter oil and/or water from an airflow to protect downstream components. The prefiltration layer may be treated with a water and/or oil repelling or absorbing material. The second layer may be a porous membrane filter positioned downstream of the prefiltration layer. The third layer may provide structural support for the first and/or second layers.