FIELD: machine building.
SUBSTANCE: group of inventions relates to a dry gas seal system in compressors. A sealing device includes the first, second and third dry gas seals set sequentially. Each seal is supplied with its own sealing gas and is fitted by its own blowing unit. The pressures of the sealing gases remain low enough so that a special compressor to supply the sealing gases is not needed. Besides, the risk of process gas escape into the atmosphere in case of seal outage is limited.
EFFECT: invention provides for higher reliability of a seal for centrifugal compressors.
10 cl, 6 dwg
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