Valves and valve actuation – With means to increase head and seat contact pressure – Seat pressed to valve
Patent
1989-03-17
1990-03-27
Fox, John
Valves and valve actuation
With means to increase head and seat contact pressure
Seat pressed to valve
251193, 251328, F16K 320
Patent
active
049114077
ABSTRACT:
A valve seat structure and assembly for a gate, ball, globe or plug type valve adapted to enhance the high-pressure seat sealing capabilities thereof, comprised in alternate embodiments of either a single or a cooperative set of rings having either an interior or exterior geometrically configured circumferentially recessive undercut channel to provide an overhang flex-lip structure against which the closed valve plug compressively seats in flex communicative seal on one side thereof and pressurized line fluid exerts a uniformly distributed circumferential counter flexure deflective force on the other side thereof, wherein the preferred embodiment overhang flex-lip structure is provided with a radially spaced plurality of flex-limit stop posts within the undercut channel thereof whereby valve plug compressive deflection of the flex-lip is restricted to less than that amount which would exceed the permanent distortion flex limit of a particular material from which the valve seat rings are constructed.
REFERENCES:
patent: 1756615 (1930-04-01), Wolff
patent: 1874405 (1932-08-01), Ward
patent: 2726843 (1955-12-01), Evans et al.
patent: 3504886 (1970-04-01), Hulslander et al.
patent: 4124194 (1978-11-01), Alvarez et al.
patent: 4208035 (1980-06-01), Alvarez et al.
patent: 4568062 (1986-02-01), Regitz et al.
Fox John
Learned Jr. Samuel M.
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