High pressure stem packing for gate valves

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

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F16K 3/14 (2006.01) F16J 15/16 (2006.01) F16J 15/20 (2006.01) F16K 41/00 (2006.01)

Patent

CA 1134798

Case 236 HIGH PRESSURE STEM PACKING FOR GATE VALVES Scott W. Binegor Houston, Texas Abstract of the Disclosure 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 re- tainer 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.

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