Retrofit second packing chamber for quarter-turn valves

Details Retrofit second packing chamber for quarter-turn valves Retrofit second packing chamber for quarter-turn valves

1994-11-16

1995-12-19

Walton, George L.

Fluid handling

With leakage or drip collecting

137315, 251214, 277105, 277106, 277123, F16K 4104, F16K 4300, F16J 1520

Patent

active

054761174

ABSTRACT:
A retrofit second packing chamber for quarter-turn valves that permits existing valves to be modified so as to meet modern emission standards without requiring replacement of the valves, and which can be assembled to existing valves in a simple, efficient manner at reasonable cost.
The retrofit second packing chamber comprises an assembly which defines a second packing chamber to be assembled to the existing first packing chamber of a valve in series therewith so as to substantially increase the protection against undesired emissions from the valve.

REFERENCES:
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patent: 3787060 (1974-01-01), Astill
patent: 4336919 (1982-06-01), Hall
patent: 4345766 (1982-08-01), Turanyi
patent: 4765631 (1988-08-01), Kohnen et al.
patent: 4972867 (1990-11-01), Ruesch
patent: 5129624 (1992-07-01), Icenhower et al.
patent: 5192049 (1993-03-01), Ridge
patent: 5203370 (1993-04-01), Block et al.
patent: 5234194 (1993-08-01), Smith
patent: 5263682 (1993-11-01), Covert et al.

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