| 摘要 |
The arrangement has a metal folding bellows acting as a dividing wall. A holding ring (8) acts simultaneously, has a centering ring for two housing parts (1,2) to be welded together and is welded to them, whereby the end surfaces of the housing parts butt flat against each other. The diameter and width of a centering recess (21) in one housing part corresp. to those of an annular collar (26) on the holding ring. The other housing part is centred on the collar via a smaller cylindrical casing surface. The center of the weld seam is located in the butt joint between the housing parts or between one part and the lateral collar surface (27).
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