Expanding gate valve

Details Expanding gate valve Expanding gate valve

1984-02-07

1985-07-30

Weakley, Harold W.

Valves and valve actuation

With means to increase head and seat contact pressure

With positive reduction

251196, 251328, 251362, 251363, 251365, F16K 2500

Patent

active

045317100

ABSTRACT:
There is disclosed an expanding gate valve having seats which are press-fitted into annular recesses in the valve body on opposite sides of the gate, each seat including a ring having at least one annular rib on its outer end which is of a harder material than that of the inner end of the recess and embedded therein to form a pressure barrier between the seat and recess.

REFERENCES:
patent: 1679779 (1928-08-01), Oberhuber
patent: 2604507 (1952-07-01), Tyson
patent: 2834571 (1958-05-01), Hollander
patent: 3006601 (1961-10-01), Anderson
patent: 3022978 (1962-02-01), Kowalski
patent: 3106219 (1963-10-01), Teston
patent: 4189127 (1980-02-01), Costantino

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