Abstract: A duct housing for a field-flux fractionation device with first and second duct housing parts being located over top of each other in the assembled state and forming a duct. A first side of the duct is limited by a membrane arranged between the two duct housing parts sealing against the outside and thus a separation volume is determined between the first duct housing part and the membrane. A first sealing area is provided at the first duct housing part and a circumferential projection, projecting from a first area defined by the first duct housing part and in the assembled state limiting a second side of the duct and surrounding the duct with the first sealing area in the assembled state engaging the membrane in a sealing fashion.

Abstract: A hollow fiber connection for the radial sealing connection between a hollow fiber and a connection element and/or between the hollow fiber and a housing, particularly for a device for field flux fractionating. Here, the hollow fiber is arranged in a housing connection of the housing. A sealing of the hollow fiber in reference to the connection element and/or the housing as well as in reference to the environment may be yielded according to the invention such that an annular element and a connection element are coupled via a connection part to the housing and/or the hollow fiber and that the hollow fiber connection achieves a sealing via a section between the hollow fiber and the connection element, which is created by an axial displacement of the annular element in reference to the connection element.