Top-entry check valve with pin fasteners

Details Top-entry check valve with pin fasteners Top-entry check valve with pin fasteners

1992-06-19

1993-03-09

Nilson, Robert G.

Fluid handling

Removable valve head and seat unit

1375274, 1375278, F16K 1503

Patent

active

051919133

ABSTRACT:
A top-entry check valve having a valve body, a valve cartridge assembly and a removable bonnet utilizes pin fasteners to prevent movement of the valve cartridge assembly in the downstream direction. The valve cartridge assembly includes a seat, a cage, a disc and a pair of downstream extensions. A fastener slot extends through each downstream extension of the valve cartridge assembly and the valve body has a mating opening corresponding to each fastener slot. Insertion of a pin fastener through each fastener slot and into the corresponding mating opening prevents the valve cartridge assembly from moving in the downstream direction. An annular shoulder in the valve body prevents movement of the seat, cage and disc in the upstream direction. The disc has a hinge pin which is cradled in hinge pin supports of the cage to hold the disc in place. Removal of the bonnet allows access to the valve chamber for replacement of the seat, cage, disc or pin fasteners.

REFERENCES:
patent: 853274 (1907-05-01), Tilden
patent: 3933173 (1976-01-01), Kajita
patent: 3996962 (1976-12-01), Sutherland
patent: 4054153 (1977-10-01), Guyton
patent: 4284097 (1981-08-01), Becker

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