Valve having hard and soft seats

Details Valve having hard and soft seats Valve having hard and soft seats

1986-08-25

1987-04-07

Cohan, Alan

Fluid handling

Line condition change responsive valves

Direct response valves

13751625, 2511496, 251362, F16K 1518, F16L 2900

Patent

active

046552510

ABSTRACT:
An improved valve is provided of the type having a spring biased ball for sealing engagement with both a metallic seat and a plastic seat. The valve is of the type including a passageway adapted for receiving a stinger to unseat the ball from both seating surfaces, thereby allowing fluid to pass through the valve body. The diameter of the soft seat approximates the diameter of the ball, and preferably at least a portion of the sealing surface of the soft seat is spaced opposite the metallic seat with respect to a plane parallel to the metallic seat and passing through the center of the fully seated ball. The soft seat may be secured in the valve body by a retainer, which maintains a radial outwardly directed force on the soft seat.

REFERENCES:
patent: 2878896 (1959-03-01), Farrell
patent: 2931385 (1960-04-01), Carlisle et al.
patent: 2959188 (1960-11-01), Kepner
patent: 3009476 (1961-11-01), Usab
patent: 3346008 (1967-10-01), Scaramucci
patent: 3372902 (1968-03-01), Gotzenberger
patent: 3548869 (1970-12-01), Weise et al.
patent: 3570484 (1971-03-01), Steer et al.
patent: 3620653 (1971-11-01), Gaylord et al.
patent: 3906986 (1975-09-01), Zurit et al.
patent: 4347915 (1982-09-01), Cooper

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