The present invention provides a depth filter which contains fine particles and coarse particles, and which exhibits excellent filtration precision with respect to a high concentration fluid and/or a high viscosity fluid. This depth filter enables filtration for a long period of time, while maintaining a low filtration pressure.

The present invention is a depth filter which is obtained by winding a fiber sheet into a cylinder, and which comprises a pre-filtration layer and a microfiltration layer; the pre-filtration layer and the microfiltration layer are formed of a fiber sheet; the fiber sheet is composed of a nonwoven fabric or a web; the average fiber diameter of the fiber sheet continuously decreases from the pre-filtration layer toward the microfiltration layer; and the average weight per square meter of the fiber sheet continuously decreases from the pre-filtration layer toward the microfiltration layer.

A media pack includes a filtration sheet and a support sheet that is made from a different material than the filtration sheet. The filtration sheet is coupled to the support sheet. The support sheet is corrugated such that, together, the filtration sheet and the support sheet form a plurality of channels. The channels are alternately sealed on opposing ends of the media pack. In one embodiment, the permeability of the support sheet is less than a permeability of the filtration sheet.

A long-life in filters is required as filter members for slurry liquid having high-viscosity and high-solid-content ratio. It is provided to solve the problem, the filter element for filtering slurry liquid, wherein nets and non-woven fabrics are alternately layered, wherein each of the nets has first fibers parallelly extending in one direction and second fibers parallelly extending in a direction angled to the one direction and contacting sides of the first fibers, wherein the first and second fibers forms mesh-pores at portions surrounded by the first and second fibers, wherein each of the non-woven fabrics has protrusions on surfaces of the each of the non-woven fabrics in a thickness-direction, the protrusions formed to repeatedly come out on the surfaces of the each of the non-woven fabrics in a surface-direction of the each of the non-woven fabrics.

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.

The invention relates to a filter element comprising one or more fluid-pervious layers of a fluid-pervious sheet material having first and second surfaces in a substantially parallel arrangement, a fluid-impervious layer arranged in fluid tight contact with at least one of said first and second surfaces of said layer(s) of fluid-pervious sheet material to substantially fully cover the first and/or second surfaces thereof, one or more first and second edge portions, said first and second edge portions being arranged at a predefined distance and separated from one another by a predefined area of the fluid-pervious sheet material, a fluid flow path limited to and extending essentially parallel to the first and second surfaces from the first edge portion(s) to the second edge portion(s) within each of said layers of fluid-pervious sheet material, said first and second edge portions providing a fluid intake and a fluid drainage at the upstream and downstream ends of said fluid flow path, respectively. The invention further relates to filter modules comprising one or more of said filter elements.

A lateral filter, a method of its use, and a system incorporating at least one lateral filter are provided. The lateral filter includes a filter screen that includes a screen wire and screen support rod comprise a non-metallic material and are a unitary, integrated, inseparable, and singular component. In using the lateral filter, a fluid entrained with solids is introduced through an exterior-facing side and permeate forms in the interior of the filter. The solids remaining in the permeate, if any, have a smallest dimension that is less than a width of a slot in the filter screen. The permeate passes from the interior of the lateral filter. Lateral filters may be incorporated into a system comprising many lateral filter, such as sand filter is configured to filter raw seawater.

A lateral filter, a method of its use, and a system incorporating at least one lateral filter are provided. The lateral filter includes a filter screen that includes a screen wire and screen support rod comprise a non-metallic material and are a unitary, integrated, inseparable, and singular component. In using the lateral filter, a fluid entrained with solids is introduced through an exterior-facing side and permeate forms in the interior of the filter. The solids remaining in the permeate, if any, have a smallest dimension that is less than a width of a slot in the filter screen. The permeate passes from the interior of the lateral filter. Lateral filters may be incorporated into a system comprising many lateral filter, such as sand filter is configured to filter raw seawater.

A filter cartridge with easier extraction provided by a roll-out clearance region for a radial seal is provided. The filter cartridge may be a two stage filter with the seal being located between stages and usable in a filtration vessel having a central separation wall with one or more riser pipes. Also, a new vessel is disclosed with multiple diameters for first and second stages of the housing with a larger second stage diameter as compared to the first stage, which can reduce door size and/or cause fluid flow velocities to be slower at the second stage relative to the first stage.

A filter comprising a housing defining an inlet, a first outlet and a second outlet, a first filter element arranged between the inlet and the first outlet such that a portion of the fluid that flows into the inlet flows through the first filter element and out of the first outlet, a second filter element arranged between the inlet and the second outlet such that a portion of the fluid that flows into the inlet flows through the second filter element and out of the second outlet, wherein the first filter element comprises a sintered material filter.

In one example, a core cover includes an inner wall that defines a fluid passageway configured to communicate with an interior of a filter core when the core cover is engaged with the filter core. As well, the core cover includes an outer wall spaced apart from the inner wall, and a complementary structure located on the outer wall and configured to engage a corresponding complementary structure of a filter core. Finally, the core cover includes one or more indicia that indicate a flow rate, or range of flow rates, associated with the core cover.