MULTI-VALVE STEM SEAL ASSEMBLY FOR A GATE VALVE
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United States of America Patent
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app pub date -
Dec 30, 2013
filing date -
Dec 31, 2012
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Abstract
A gate valve for use in oil field applications and including a stem seal assembly. The stem seal assembly includes primary, secondary, and tertiary seals for sealing the space between the stem and the bonnet. The provision of multiple seals in the stem seal assembly provides redundancy that allows for maintenance of the seal between the components even if one or two of the individual seals fail.
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