Abstract: 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.

Abstract: 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.

Abstract: A filter module comprises a non-filtrate draining spacer element, a filter layer, a filtrate draining spacer element, a filter layer, a non-filtrate draining spacer element, a filter layer, and a filtrate draining spacer layer stacked on one another in an axial direction, wherein at least some of the draining spacer elements comprise connecting means around the outer circumference to compress and seal off the filter layers between the draining spacer elements.

Abstract: A membrane module includes at least one hollow fibre membrane; a first resin layer formed around an end of the at least one hollow fibre membrane; and a second resin layer chemically bound to the first resin layer, wherein the second resin layer is of greater flexibility than the first resin layer.

Abstract: An apparatus for potting membranes. The apparatus may include a mould for receiving ends of the membranes, means for forming a first layer of a curable resin material around the ends in the mould, and means for applying a second layer of a flexible resin material to the first layer prior to full curing of the first layer. The flexible resin material may be chemically reactive with the curable resin material to form an adhesive bond therebetween. A potting sleeve may be positioned within the mould. A centrifuge may receive the curable resin and/or the flexible resin material upstream of the mould.

Abstract: A filter module has layers of a filter medium between which are draining elements. The draining layers and the filter layers are stacked on one another, and the draining layers are sealed on alternate sides by sealing elements.

Abstract: A filter module comprises a non-filtrate draining spacer element, a filter layer, a filtrate draining spacer element, a filter layer, a non-filtrate draining spacer element, a filter layer, and a filtrate draining spacer layer stacked on one another in an axial direction, wherein at least some of the draining spacer elements comprise connecting means around the outer circumference to compress and seal off the filter layers between the draining spacer elements.

Abstract: The invention relates to a filter module (1) comprising filters layers (4a, b) made of a filter medium, especially comprising filter layers made of filter strata. Said filter layers alternate with layers made of draining spacer elements 910, 10a, b, 20), the first and last layer of the filter module (1) consisting respectively of a draining spacer element (10a, b, 20). The draining spacer elements respectively and mutually comprise flow elements (12a, b) and sealing elements (11a, b) for the filtrate chamber and the non-filtrate chamber (40, 41). Means are provided for the mutual connection thereof. The aim of the filter module (1) is to combine the advantages of known filter modules with improved sealing at the edges of the filter layers, and to make the filter module backwashable. The filter module (1) comprises draining spacer elements (10, 10a, b, 20) which are embodied in such a way that they enable the filter layers to be pressed in a sealing manner.

Abstract: A filtering device having a filter housing is described, which has a replaceable filter cartridge which can be inserted into the filter housing and which contains a filter element, particularly in the form of a bundle of capillary or hollow fiber membranes. At the ends of the cartridge the filter element is embedded in a sealing compound of the end piece, and the peripheral surface of the end piece is in the form of a sealing face and carries at least one sealing element. The peripheral surface of the end piece has a retaining structure, preferably integrally molded thereon so as to cooperate with the retaining device, and the retaining device and the retaining structure preferably interengage slackly to allow for movement of the filter cartridge in at least one direction.

Abstract: A method of forming a pot for an array of hollow fibre membranes (7) is provided, including the steps of placing the ends (6) of the fibre membranes (7) in a mould (5); forming a first layer (20) of curable resin material in a non-cured state around the fibre membrane ends (6), applying a second layer (21) of a polyurethane resin material to the first layer (20) prior to full curing of the first layer, the polyurethane resin material layer being chemically reactive with the first layer material to form an adhesive bond therebetween; at least partially curing both layers and removing the pot formed from the mould (5), wherein the second layer material is of higher flexibility than the first layer material when each layer is fully cured. Apparatus for performing the method is also disclosed.

Abstract: A method of forming a pot for an array of hollow fiber membranes (7) is provided, including the steps of placing the ends (6) of the fiber membranes (7) in a mould (5); forming a first layer (20) of curable resin material in a non-cured state around the fiber membrane ends (6), applying a second layer (21) of a polyurethane resin material to the first layer (20) prior to full curing of the first layer, the polyurethane resin material layer being chemically reactive with the first layer material to form an adhesive bond therebetween; at least partially curing both layers and removing the pot formed from the mould (5), wherein the second layer material is of higher flexibility than the first layer material when each layer is fully cured. Apparatus for performing the method is also disclosed.

Abstract: A filter module has layers of a filter medium between which are draining elements. The draining layers and the filter layers are stacked on one another, and the draining layers are sealed on alternate sides by means of sealing elements.

Abstract: A filter cartridge including a porous layer of specific thickness wherein the layer exhibits a structure which has progressively smaller pore sizes, as measured in the direction of flow, and filter aids are incorporated in the porous layer and are introduced into, and anchored in, the porous layer by means of preconditioning, is disclosed.

Abstract: A method of forming a pot for an array of hollow fibre membranes (7) is provided, including the steps of placing the ends (6) of the fibre membranes (7) in a mould (5); forming a first layer (20) of curable resin material in a non-cured state around the fibre membrane ends (6), applying a second layer (21) of a polyurethane resin material to the first layer (20) prior to full curing of the first layer, the polyurethane resin material layer being chemically reactive with the first layer material to form an adhesive bond therebetween; at least partially curing both layers and removing the pot formed from the mould (5), wherein the second layer material is of higher flexibility than the first layer material when each layer is fully cured. Apparatus for performing the method is also disclosed.

Abstract: A filtering apparatus is described which is designed to reduce or completely eliminate dripping losses and in which fitting or exchanging filtering elements can be carried out in a simpler manner. The filtering apparatus is characterized in that there is provided, between the end plate and the pressure plate, at least one filter carriage mounted for displacement on the cross beams and having a compression-proof outer wall and exhibiting at least one chamber for the accommodation of at least one filter module composed of filtering elements.

Abstract: A filter module comprising filtering layers composed of a filter medium is described, in which layers of first and second draining spacing elements alternate and the draining spacing elements show, in an alternating sequence with respect to the filtrate chambers and the non-filtrate chambers throughflow elements on one side and sealing elements on the other side. In order to improve filtration and to make it possible to fulfil additional aims with reference to filtration and treatment of the fluid, whilst retaining a solid construction, the filter module is equipped with third spacing elements. Between two filtering layers, which are disposed between a first and second spacing element, there is disposed at least one such third spacing element which has sealing elements adjacent the filtrate chamber and the non-filtrate chamber. A process for the production of a filter module that is at least partially filled with treating material is also described.

Abstract: The invention relates to a filter module (4) with a simplified design which allows for the manufacturing of a step filter, Each ply of filter medium is composed of a deep-bed filter material layer (1, 1a-d) and the packing is composed of draining layers (5, 5a, 5b). The draining layers (5, 5a, 5b) and filter layers (5, 5a, 5b) are mutually sealed to the filtrate/non-filtrate chamber (2,3). The filter layers (1, 1a-d) can be arranged according to any pattern.

Abstract: The invention relates to a filter module comprising a number A of circular filter cell (1), a number A−1 of spacer rings (3), and two end rings (4), whereby the filter cells (1) and the rings (3, 4) are combined to form a stack while forming a central continuous channel (2) using tension elements (5) which are interspaced in the circumferential direction of the channel wall and which, on the inner side, engage on the end rings (4) in order to transmit axial tension forces. According to the invention, tensioning elements comprised of strips (5) with hook-shaped ends (6, 13, 14) are provided for securely combining the filter cell that are arranged in a stack. Said hook-shaped ends can be fixed in the end rings by effecting an essentially radial hooking-in or engaging movement, In addition, means (10, 11) are provided which prevent an unintentional radial hook-removal or disengaging movement of the hook-shaped ends (6, 13, 14).

Abstract: Flat, stackable filter disk elements include a deep bed filter material for removing particulates from a flow of unfiltered fluid and thereby obtain a filtered fluid. The filter material has a thickness extending between a pair of major parallel planar surfaces which define a filter element plane, and include a first flow openings for the filtered fluid, a second flow opening for unfiltered fluid, and a collection opening for collecting one of the filtered and unfiltered fluids. The collection opening and the first and second flow openings extend through the filter material between the planar surfaces. The first and second flow openings also respectively define first and second flow surfaces for the filtered and unfiltered fluids which are substantially perpendicular to the filter element plane and which establish a fluid flow path between the first and second flow openings through the filter material which is substantially parallel to the filter element plane.

Abstract: The invention relates to a filtration device for deep-bed filtration which is easier to handle and enables filter modules(s) to be changed and disposed of easily. The filtration device has a casing with at least one filter module inserted in the casing with filter elements made from deep-bed filter materials stacked on top of each other. The filter elements have at least one internal structure formed by a perforation wherein the boundary surface of the perforation formed by the deep-bed filter materials creates a through-flow surface for filtrates or non-filtrates. At least one end plate has at least one inlet and/or outlet.