Expansion seal
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United States of America Patent
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Jul 3, 2007
Grant Date -
Jun 7, 2007
app pub date -
Dec 7, 2005
filing date -
Dec 7, 2005
priority date (Note) -
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Abstract
A hot gas seal for a conduit penetrating the wall(s) of a vessel such as a heat recovery steam generator unit. The seal includes three serially-arranged, independent insulation segments or pillows. The pillow adjacent the vessel casing and the center pillow employ metal sheets to sandwich insulation therebetween. The center pillow travels laterally with the conduit. The third or outer pillow terminates in a split seal ring having a containment structure attached thereto.
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