Protected soft seat with secondary hard seat

Details Protected soft seat with secondary hard seat Protected soft seat with secondary hard seat

1996-05-23

1997-04-08

Lee, Kevin

Valves and valve actuation

Sequential opening or closing of serial ports in single flow...

251332, F16K 2500

Patent

active

056180250

ABSTRACT:
A fluid control valve operable in erosive fluid conditions includes a primary soft seat protected by a secondary hard seat. Two dead band areas control the fluid flow on valve opening and closing to spacially separate the soft seat from the flow stream. A diverter is provided to deflect the flow stream away from the soft seat.

REFERENCES:
patent: 117689 (1871-08-01), Russell
patent: 670083 (1901-03-01), Osborne
patent: 1492980 (1924-05-01), Hodges
patent: 1595786 (1926-08-01), Johnson
patent: 2240521 (1941-05-01), Schnell
patent: 2403028 (1946-07-01), Smith
patent: 2610021 (1952-09-01), Smith
patent: 3059894 (1962-10-01), Knecht et al.
patent: 3125122 (1964-03-01), Bermingham
patent: 3228651 (1966-01-01), Egashira
patent: 4228987 (1980-10-01), Potter
Fisher Controls EZ Valve Type with soft seat (1 page).
Masoneilan Dual Seated Valve Plug with hard seat and soft seat (2 pages).

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