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compressor dry gas seals 1

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tomato5

tomato5

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a very large number of centrifugal compressor services seem to do well with a tandem arangement usually with an intermediate labyrinth.

could you indicate from FIELD experience, where have you found a double seal to be of more value please give some specific scenarios/reasoning

thank you
 
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Common in low pressure applications (wet gas, cocker gas for refineries), where no emissions of process gas through vent are tolerated (e.g. H2S content).
 
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