Check valve having self energizing seal

Details Check valve having self energizing seal Check valve having self energizing seal

1975-09-30

1976-08-17

Weakley, Harold W.

Fluid handling

Line condition change responsive valves

Direct response valves

251 84, 251173, 251307, F16K 1500

Patent

active

039748553

ABSTRACT:
An improved check valve having a housing or body with parallel faces and a substantially circular opening therethrough, and a shaft transverse to the opening. A flapper disc is rigidly attached to the shaft. A seat means comprising a metal ring is inserted into the upstream face of the body, and has a seating surface which is a truncated conical surface, tapering upstream. The conical surface is tangent to a sphere centered in said body. The disc, when closed, is in the plane of the seating surface. The edge of the plate is in close spacing to the seating surface, and is correspondingly tapered. The edge of the plate has a rectangular groove having a cylindrical base and walls perpendicular to the base. An O-ring is seated in the groove, and provides a self energizing seal. Means are provided to center the disc in the seat. Means are provided to apply a selected torque to the shaft.

REFERENCES:
patent: 3172424 (1965-03-01), Stillwagon
patent: 3230971 (1966-01-01), Rosaen
patent: 3314642 (1967-04-01), Kautz
patent: 3521857 (1970-07-01), Over

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