Embodiments provide a filter with a generally rectangular, non-cylindrical profile. The filter may have multiple pleat packs positioned between pleat covers that define regions and flow channels in a cavity of the filter body. The pleat covers have openings that allow a fluid to flow through the multiple pleat packs via parallel flows or series flows. End caps bonded to the body define flow passages for directing the fluid from an inlet to an outlet via the pleat packs for series or parallel filtration. The pleat packs may be made of the same or different materials and may be configured with the same or different heights based on flow requirements. A cage or a separator may be positioned between the pleat packs. The pleat packs may be made of a continuous pleated membrane with bridges defining a space between the pleat packs to accommodate the cage or separator.

A filter apparatus and method utilize a filter element, defining a longitudinal axis and an axial end thereof, and having a central winding structure and a length of fluted filter material wound about the winding structure with the flutes of the media oriented to provide for filtration of fluid passing axially through the filter element. An edge of filter media defines the axial end of the filter element when the media is wound about the winding structure. An axial end of the winding structure is disposed adjacent the axial end of the filter element. A winding feature extends substantially axially outward from the axial end of the winding structure to a distal end of the winding feature. The filter media is wrapped about the winding structure such that the axial end of the filter element is disposed substantially flush with the distal end of the winding feature.

A filter element includes a construction of pleated filter media defining an interior volume. First and second opposite end caps are secured to opposite ends of the filter media. A support structure supports the filter media and is operably oriented in the interior volume. The support structure extends from the first opposing interior face to the second opposing interior face. The support structure is provided to extend less than a full extension between the first end cap and second end cap.

The invention relates to the technical field of filtering equipment, and discloses a dust removal filter cartridge. The dust removal filter cartridge includes a filter material and a filter net arranged in the filter material. A top cover is arranged on a top end of the filter material, and an air outlet is provided in the top cover. A bottom end of the filter material is sealed with a bottom cover. An inner side of the filter material is provided with binding tapes which are adhesively fixed on the filter material. An outer surface of the filter material is an effective filtering surface for dust removal, and the binding tapes are arranged on the inner side of the filter material. During the dust removal process, filtering area of an outer surface of a filter paper increases, and the filtering effect is good.

Method and apparatus are disclosed for filter racks for blower coil units. An example filter rack for a blower coil unit includes a frame. The frame includes a rear frame structure, a front frame structure coupled to and spaced apart from the rear frame structure to define a slot that is configured to house a filter for filtering air flowing from a blow coil unit, and a side extending between the front frame structure and the rear frame structure. The side defines a first opening to the slot to enable the filter to be inserted into and removed from the slot. The example filter rack also includes a magnet fixed along the side and a panel configured to couple to the side via the magnet. The panel securely encloses the filter within the slot when coupled to the side and provides access to the slot when decoupled from the side.

A filter candle is provided, comprising one or more filter elements shaped as hollow cylinders of porous material, the filter elements having substantially identical inner and outer diameters and are disposed coaxially with each other; a support element comprising a metal tube disposed within the filter element(s), said metal tube having an outer diameter smaller than the inner diameter of the filter element(s), said metal tube having a wall with a plurality of perforations; and at least two annular sealing disks having an outer diameter equal to or larger than that of the filter element(s) and an inner diameter smaller than that of the filter element(s), wherein first and second terminal sealing disks are disposed at opposite axial end faces of a single filter element or of a plurality of filter elements disposed in line,
wherein the filter elements are compressed between the first and second terminal sealing disks.

A secondary element with a first open end and a second end positioned opposite the first end has a filter medium arranged about a longitudinal axis of the secondary element and extending from the first open end to the second end. A closed end disc is disposed at the second end and seal-tightly closes off the second end. The closed end disc has a first connecting element that, for an intended installation of the secondary element in a filter system, is configured to interact with a second connecting element of a support tube of the filter system to secure the secondary element on the support tube. A filter system with such a secondary element has a support tube provided with a complementary second connecting element, wherein the secondary element is secured on the support tube by the first and second connecting elements engaging each other.

Economical, easy to install and use, and disposable, air filter for an HVAC system. The filter is quasi-universal with respect to the size of the air intake vent over which it can be deployed, and it requires less frequent replacement of filter material than is common with typical throwaway (box-type) air filters. When replacement of filter material is needed, the replacement can be done with less or no direct handling of or exposure to the dirty filter material. In use, the filter maintains relatively consistent cleanliness of the filter material by automatic, periodic scrolling of the filter material to replenish the filtering surface.

An air filter includes a filter media, an end cap, a urethane outlet air seal, and a screen assembly. The end cap is secured to a first end of the filter media. The urethane outlet air seal is secured to a second, opposite end of the filter media. The screen assembly is secured to a central portion of the filter media between the first and second ends.

A filter mesh frame is provided. The filter mesh frame includes a first mesh and a second mesh. The first mesh surrounds to form a cylinder with respect to a first pivot direction. The second mesh surrounds the first mesh with respect to a first pivot direction and includes a plurality of bar structures, where the bar structures protrude outward with respect to the first mesh and are disposed parallel to the first pivot direction. A groove parallel to the first pivot direction is formed on one side of each bar structure with respect to the first mesh.