Valves and valve actuation – Reciprocating valve – Gate
Patent
1982-06-10
1984-12-11
Weakley, Harold W.
Valves and valve actuation
Reciprocating valve
Gate
251327, 251195, 251167, F16K 300
Patent
active
044873930
ABSTRACT:
An expanding gate valve having a pressure-secured seat. The valve includes a valve body having a cavity formed therein and an inlet and outlet formed in the body, both of which intersect the cavity. A counterbore is formed about the circumference of both the inlet and the outlet at their respective intersections with the cavity. An annular seat having a rear surface and a front seat surface is received within the inlet counterbore. An annular seal is formed on the front seat surface and a second annular seal is disposed between the rear surface and the valve body. The front annular seal has a sealing diameter greater than the rear annular seal and an annular recess is formed on the front seat surface on the radially inward side of the annular seal. A second annular seat having a planar front seat surface is received within the outlet counterbore. An expandable gate is mounted for selective vertical positioning in the cavity for permitting flow between the inlet and outlet in one position and for sealing off such flow in another position. When in position for sealing off such flow, the gate is expanded into sealing engagement with the first and second seats.
REFERENCES:
patent: 293329 (1884-02-01), Jenkins
patent: 2834571 (1958-05-01), Hollander
patent: 3006601 (1961-10-01), Anderson
patent: 3689028 (1972-08-01), Dickenson
patent: 3765440 (1973-10-01), Grove
Barton Valve Company, Inc.
Laney William R.
Weakley Harold W.
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