Fluid check valve with replaceable flapper assembly

Details Fluid check valve with replaceable flapper assembly Fluid check valve with replaceable flapper assembly

1993-09-16

1995-01-17

Nilson, Robert G.

Fluid handling

Removable valve head and seat unit

1375121, 1375274, F16K 1503

Patent

active

053818210

ABSTRACT:
A replaceable flapper and keeper assembly for a fluid check valve. The assembly may be part of a larger replaceable seat ring assembly or be adapted to be secured directly on an integral check valve seat. The flappers have hinge brackets and are pivotally attached to a hinge pin that extends through holes in keepers. The flappers are adapted to be moveable in the direction of the valve axis (or normal to the plane of the flappers when in closed position) by having the holes in their hinge brackets elongated only in this direction. The flappers are able to move downstream of the seat before opening, minimizing wear and damage. Flapper, keeper and hinge pin are easily replaceable.

REFERENCES:
patent: 3072141 (1963-01-01), Wheeler
patent: 4079751 (1978-03-01), Partridge
patent: 4257444 (1981-03-01), Ogle
patent: 4694853 (1987-09-01), Goodwin
patent: 4977926 (1990-12-01), Hocking
patent: 5150733 (1992-09-01), Scaramucci
patent: 5246032 (1993-09-01), Muddiman

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