High pressure stem packing for gate valves

Details High pressure stem packing for gate valves High pressure stem packing for gate valves

1979-08-30

1981-04-21

Schwadron, Martin P.

Fluid handling

With cleaner, lubrication added to fluid or liquid sealing...

Liquid supplied at valve interface

277117, 277123, 251214, 251330, 13724622, F16K 314, F16J 1500

Patent

active

042626900

ABSTRACT:
A pressure energized packing arrangement (50, 74) for sealing the stem (64) and bonnet (66) of a high pressure gate valve. A stack of packing rings (90) is compressed against the valve stem and bonnet by retainer rings (92, 94) which are urged together by fluid pressure in the valve body. Extrusion of the packing rings (90) is prevented by metal chamfer rings (102, 108, 114, 120) which are cammed by the retainer rings (92, 94 ) against the valve stem (64) and bonnet (66). The packing assembly is held together by pins (124) against which metal gaskets (132) are cammed by the retainer rings (92, 94) to prevent extrusion of the packing rings (90) along the pins.

REFERENCES:
patent: 1360939 (1920-11-01), Hall
patent: 3051434 (1962-08-01), Gulick
patent: 3663076 (1972-05-01), Valente
patent: 3765642 (1973-10-01), Nelson
patent: 3923285 (1975-12-01), Diehl et al.
patent: 3958592 (1976-05-01), Wells et al.
patent: 3964754 (1976-06-01), Murai et al.
patent: 4029294 (1977-06-01), McCaskill et al.
patent: 4149558 (1979-04-01), McGee et al.

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