Title:
VALVE
Document Type and Number:
Japanese Patent JPS5676765
Kind Code:
A
Abstract:
A valve seal mechanism for cryogenic applications includes an undercut groove in a seating region of the fluid passageway in a valve body. Disposed within the groove is a shouldered resilient wear ring of polytetrafluoroethylene, the outer circumference of the shouldered portion of the wear ring having a V-shaped channel formed therein. A solid backing ring having an inner circumferential surface of wedge-shaped cross section makes an interference fit with the V-channel of the wear ring, thereby preloading the channel sides against the respective adjacent sides of the groove. A valve disc has a sealing surface which makes an interference fit with a seating surface forming the inner circumferential surface of the wear ring. Introduction of fluid under pressure and reduction of temperatures from normal ambient to cryogenic both tend to increase sealing effectiveness.
Inventors:
RONARUDO ARUFU ORANSEN
JIYON MANROU KOORII
HARII CHIESUTAA CHIYANPURIN JI
JIYON MANROU KOORII
HARII CHIESUTAA CHIYANPURIN JI
Application Number:
JP12663580A
Publication Date:
June 24, 1981
Filing Date:
September 11, 1980
Export Citation:
Assignee:
POSI SEAL INTERNATIONAL
International Classes:
F16K1/226; F16K1/228; (IPC1-7): F16K1/226
Foreign References:
| US3642248A | 1972-02-15 |