Dry gas blow down seal

Details Dry gas blow down seal Dry gas blow down seal

2009-04-06

2011-11-22

Landau, Matthew (Department: 2813)

Rotary kinetic fluid motors or pumps

Bearing, seal, or liner between shaft or shaft sleeve and...

C415S230000, C415S231000, C415S110000

Reexamination Certificate

active

08061984

ABSTRACT:
A sealing assembly configured to seal a rotating shaft of a turbo machine having a high pressure process gas, comprising a housing defining a bore configured to receive the rotating shaft and sealing assembly, wherein the housing is mounted to a casing of the turbo machine; a first sealing stage comprising a single dry gas seal and configured to blow down the high pressure process gas to a lower pressure; a labyrinth seal mounted longitudinally outward from the first sealing stage; and a second sealing stage mounted longitudinally outward from the labyrinth seal, wherein the second sealing stage comprises a tandem dry gas seal having a primary dry gas seal and a secondary dry gas seal axially spaced with an intermediate labyrinth seal.

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United Kingdom Search Report issued for Application No. GB1004541.7 dated Jun. 30, 2010, 3 pages.

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