Partition wall for sealing the rear compartment of a radial compressor

The intermediate wall (40) for sealing the rear compartment of the compressor wheel (71) of a centrifugal compressor with respect to one of a bearing housing (30) enclosed bearing space has a circumferential, rotationally symmetrically shaped mounting flange (41), which is provided for fixing the intermediate wall to the adjacent bearing housing and which has a planar contact surface for resting on a contact surface of the bearing housing. In this case, in the mounting flange, a plurality of bores (42, 43) taken on a virtual circular line, wherein the bores comprise at least one sealing air passage (42) and several, distributed in the circumferential direction on the virtual circular line arranged bores (43) for receiving fasteners (50) , The partition according to the invention is designed as a rotationally symmetrical disc which can be brought into production by the processing method turning and milling without any further into their final form. For the blocking air passage, a drill is only necessary, which can also be used for the drilling of bores for receiving the fastening means. Thereby, the manufacturing process can be compared with a conventional partition simplified.