Due to increasing demands on the reliability of process gas compressors, measures to protect the counter-body surfaces of the sealing and rider rings are becoming increasingly important. In this regard, the influences of different coatings on the processes involving dry-running friction contact are not clear. Bench tests with dry-running sealing systems have revealed notable changes in surface texture, typically accompanied by severe wear of the sealing elements after just 500 hours of testing in the case of some coatings, despite high hardness values significantly in excess of 1000 HV.
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