Valve stem having conditioned lubricating surfaces
Movable valve apparatus (306) having conditioned lubricating surfaces (332) are described. As example valve includes a valve packing (308) having a graphite packing ring (314) disposed within a bonnet (304) of the fluid valve and a stem or shaft (302) as a conditioned surface to hold a lubricating m...
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Format: | Patent |
Sprache: | eng ; fre ; ger |
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