Abstract: A module for crossflow filtration, a method of making same, and a filtration device that accommodates at least one such module, which includes at least two multilayer filter units which are stacked on top of one another and are separated from one another by a respective spacer, with the module having at least one channel for unfiltered material and at least one filtrate channel that connects the filter units. The module further includes a sealing material ring for sealingly interconnecting peripheral portions of the filter units, with at least one edge section of the filter units being spaced from the sealing material ring to form the channels for unfiltered material. The layers of each individual filter unit are fused together at least at edge sections that are not embedded in the sealing material ring which, at edge sections of the filter units that are embedded therein, has a width that is sufficient to completely accommodate the filtrate channels.

Abstract: In known membrane filter modules the sealing of the inlet of the faces of the capillary or hollow fiber membranes relative to the inlet of the stainless steel filter housing suffers from loosening of the sealing compound from the housing and from ruptures within the sealing compound due to different extension coefficients of the materials employed. With the inventive membrane filter module the safe employment of stainless steel filter housings with sealings and fluid distributing heads made of plastic is possible. At least a portion of the outer mantle surface of the end of the membrane bundle which is enclosed by a sealing compound or fused with plastic material is exposed so that the exposed outer mantle surface of the end of the membrane bundle may cooperate with sealing elements. Due to the fact that the sealing no longer acts on the stainless steel housing a simple and safe combination of the membrane filter module with the fluid distributing heads made of plastic is achieved.

Abstract: A module for crossflow filtration, a method of making same, and a filtration device that accommodates at least one such module, which includes at least two multilayer filter units which are stacked on top of one another and are separated from one another by a respective spacer, with the module having at least one channel for unfiltered material and at least one filtrate channel that connects the filter units. The module further comprises a sealing material ring for sealingly interconnecting peripheral portions of the filter units, with at least one edge section of the filter units being spaced from the sealing material ring to form the channels for unfiltered material. The layers of each individual filter unit are fused together at least at edge sections that are not embedded in the sealing material ring which, at edge sections of the filter units that are embedded therein, has a width that is sufficient to completely accommodate the filtrate channels.

Abstract: With known fluid distributing heads a change of the fluid path for a given fixedly mounted membrane filter apparatus is only possible by using special adapters, respectively, insert parts due to the varying geometry of the flow channels of the fluid distributing heads for outer, respectively, inner flow paths. The suggested fluid distributing heads specific to inner or outer flow path facilitate the use of a filter module with fluid distributing heads within a membrane filter apparatus.

Abstract: A membrane type filtering device has modules containing bundles of capillary tubular membranes. To meet various filtration problems the modules have double accesses located at the two end faces of the module housings. Connections to these accesses are made by plugging in the module ends into flow distributor heads, which can be of two types whereby the crossflow can be selectively conducted either through the internal passages of the capillary membranes or else along the outsides of the capillary membranes. Appropriate matching is achieved by exchangeable inserts and exchangeable intermediate tension plates and end tension plates.