Valve assembly and method

Details Valve assembly and method Valve assembly and method

1998-06-24

1999-11-09

Walton, George L.

Fluid handling

Processes

Cleaning, repairing, or assembling

137240, 251214, 277512, 277516, F16J 1540, F16K 4100

Patent

active

059794836

ABSTRACT:
Disclosed is a valve assembly having a slidable valve stem that passes through a bushing enclosed in a bonnet. At least one circumferential stem seal seals the valve stem to the bushing. At least one passageway is provided through the bushing for injecting a fluid between the valve stem and the bushing to wash out deposits. A second optional passageway is also provided for injecting a lubricant around the valve stem.

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