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Split ring seal of a centrifugal pump

  • US 4,867,638 A
  • Filed: 03/09/1988
  • Issued: 09/19/1989
  • Est. Priority Date: 03/19/1987
  • Status: Expired due to Term
First Claim
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1. A split ring seal of a centrifugal pump which is formed by an inner ring disposed on the front cover disk of the impeller and by an outer ring disposed on the pump housing,characterized in that said two rings consist of a sintered material and that at least said cover disk and at least the portion of said pump housing which is adjacent to said outer ring consist of a cast polyamide which is made by the activated anionic polymerization of monomeric laurinlactam and to which the two rings are respectively connected in a frictional or positive manner.

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