Pleated filtration media, media packs, filter elements, and methods for filtering fluid are provided which contain three dimensional flutes in the media surface, the flutes configured to improve filter performance. In certain embodiments the flutes have defined peaks that reduce masking between adjacent pleats, the flutes have ridges along their length to modify flute cross sectional geometry, and/or the flutes provide for volume asymmetry across the media.

An oil filter for an oil filtration system. The filter is configured for insertion into an oil filtration unit. The filter comprises a central opening extending along a central axis of the filter, at least one second physical structure having a second cross sectional shape and a predefined longitudinal length in relation to the central axis of the filter, and an inner periphery of the second physical structure being arranged to mate with the outer periphery of the first physical structure allowing the filter to reach its correct insertion position in the oil filtration unit by the second physical structure at least partly surrounding the first physical structure. The end surface of the filter relative to the central axis of the filter comprises the second physical structure, and the second physical structure comprises a material configured to serve as a filtering material of the filter.

An oil filter for an oil filtration system. The filter is configured for insertion into an oil filtration unit. The filter comprises a central opening extending along a central axis of the filter, at least one second physical structure having a second cross sectional shape and a predefined longitudinal length in relation to the central axis of the filter, and an inner periphery of the second physical structure being arranged to mate with the outer periphery of the first physical structure allowing the filter to reach its correct insertion position in the oil filtration unit by the second physical structure at least partly surrounding the first physical structure. The end surface of the filter relative to the central axis of the filter comprises the second physical structure, and the second physical structure comprises a material configured to serve as a filtering material of the filter.

The filter element of a filter has an internal face, an external face, a filtering mesh, two concentric circular inner and outer edges between which the filtering mesh extends, and radial ribs provided on the internal face. The radial ribs extend between the concentric edges and are distributed circumferentially in order to form sectors on the internal face. The filter element is configured to be assembled against a corresponding filter element so that the internal face faces the corresponding filter element. At least some of the sectors have a reinforcing rib connecting a radial rib to the outer edge, the reinforcing rib having a portion that is inclined, when viewed in the radial plane, with respect to the radial rib and to the outer edge.

The filter element of a filter has an internal face, an external face, a filtering mesh, two concentric circular inner and outer edges between which the filtering mesh extends, and radial ribs provided on the internal face. The radial ribs extend between the concentric edges and are distributed circumferentially in order to form sectors on the internal face. The filter element is configured to be assembled against a corresponding filter element so that the internal face faces the corresponding filter element. At least some of the sectors have a reinforcing rib connecting a radial rib to the outer edge, the reinforcing rib having a portion that is inclined, when viewed in the radial plane, with respect to the radial rib and to the outer edge.

A filter for filtering liquid, comprising: a cylindrical housing; and a multiplicity of discs positioned perpendicularly to a height of the cylindrical housing, each of the multiplicity of discs comprised of a first number of cassettes, wherein each cassette is shaped as a truncated sector having a wide end and a narrow end, the cassettes arranged such that a perimeter of the disc is formed by the wide end of the first number of cassettes, and wherein each of the first number of cassettes is connected to a housing at its wide end, and each cassette having an opening along the wide end, wherein during filtration, liquid being filtered flows over the multiplicity of discs towards the perimeter of the multiplicity of discs.

The present relates to an oil filtration system (1) comprising an oil filtration unit (2), an oil filter (13) having a central opening (15) extending along a central axis (B) of the oil filter (13), the oil filtration unit (2) being provided with at least one first physical structure (18,18,18) having a first cross-sectional shape and a predefined longitudinal length (x) in relation to the central axis (A) of the oil filtration unit (2), the oil filter (13) being provided with at least one second physical structure (23,23,23) having a second cross sectional shape and a predefined longitudinal length (y) in relation to the central axis (B) of the oil filter (13) and an inner or outer periphery of the second physical structure (23,23,23) being arranged to mate with the outer or inner periphery of the first physical structure (18,18,18) allowing the oil filter (13) to reach its correct insertion position in the oil filtration unit (2), where at least one of the end surfaces (28,29,31) of the oil filter (13) relative to the central axis (B) of the oil filter (13) comprises the at least one second physical structure (23,23,23).

The present relates to an oil filtration system (1) comprising an oil filtration unit (2), an oil filter (13) having a central opening (15) extending along a central axis (B) of the oil filter (13), the oil filtration unit (2) being provided with at least one first physical structure (18,18,18) having a first cross-sectional shape and a predefined longitudinal length (x) in relation to the central axis (A) of the oil filtration unit (2), the oil filter (13) being provided with at least one second physical structure (23,23,23) having a second cross sectional shape and a predefined longitudinal length (y) in relation to the central axis (B) of the oil filter (13) and an inner or outer periphery of the second physical structure (23,23,23) being arranged to mate with the outer or inner periphery of the first physical structure (18,18,18) allowing the oil filter (13) to reach its correct insertion position in the oil filtration unit (2), where at least one of the end surfaces (28,29,31) of the oil filter (13) relative to the central axis (B) of the oil filter (13) comprises the at least one second physical structure (23,23,23).

A module comprises a cell stack having a plurality of alternating ion depleting compartments and ion concentrating compartments, an inlet manifold configured to facilitate a flow of fluid into the cell stack, and a first flow distribution system, associated with the inlet manifold, including a first ramp to promote the circulation of the flow of fluid into the cell stack.

Membrane cell stack arrangement and method of manufacturing such a membrane cell stack arrangement. The arrangement has a housing (2) having a central axis, and a stack of membrane cells (4), each membrane cell (6) being arranged inside the housing (2) with a major surface (6a) of the membrane cell (6) oriented substantially perpendicular to the central axis. Each membrane cell (6) has a corner recess (12) between each two adjacent sides of at least four sides (10a-d). Sealing compartments (14) are provided by corner recesses (12) of adjacent membrane cells of the stack of membrane cells (4) in co-operation with a part of an inner surface (2a) of the housing (2).