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Compressors: How to Achieve High Reliability & Availability by Fred K. Geitner, Heinz P. Bloch

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CHAPTER 4
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Wet and Dry Gas Seals for Centrifugal Compressors
Shaft seals keep the compressed gas from leaking out and the need for leakage prevention may include process economy, safety, and environmental protection. Moreover, the process gas will usually have to be kept away from the compressor bearings. In essence, seals are located between the compressed gas and the bearings; a number of different sealing arrangements and configurations are found in industry. An overview of four principal seal types is provided in Fig. 4.1. Within each of the four principal types one finds numerous variants.
FIGURE 4.1   Compressor seal overview depicting ...

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