Valve having integrity assurance means

Details Valve having integrity assurance means Valve having integrity assurance means

1975-12-22

1978-01-10

Schwadron, Martin P.

Fluid handling

With leakage or drip collecting

251306, F16K 1226

Patent

active

040673529

ABSTRACT:
A valve having integrity assurance means including a valve body with a flow passageway through it, the flow passageway having a circumferential valve seat and the valve body having a small diameter test opening communicating the seat with the exterior of the valve, and having a valve disc with a circumferential sealing surface supported in the body, the disc being rotatable to an open position permitting fluid flow through the valve to either side of the disc and to another position to close the valve by the contact of the disc sealing surface with the valve seat, the disc sealing surface and the valve seat having cooperative configuration to provide two spaced apart circumferential contact areas between the seat and the disc, the test opening communicating between these contact areas so that when the valve is in the fully closed position the test opening can be utilized as a means to test the integrity of the valve, that is, to insure that no leakage is occurring past the valve disc. In one embodiment the disc has two raised, circumferential, spaced-apart, sealing surfaces which engage an elastomeric seat in the valve body. In another embodiment the valve disc has two spaced apart circumferential grooves with resilient seals therein which engage the valve sealing surface to either side of the test opening when the valve is in the closed position.

REFERENCES:
patent: 2058996 (1936-10-01), Kollberg
patent: 2883149 (1959-04-01), Fiorentini
patent: 3026083 (1962-03-01), McLaren et al.
patent: 3030066 (1962-04-01), Swain
patent: 3043557 (1962-07-01), Stillwagon
patent: 3473554 (1969-10-01), King
patent: 3650508 (1972-03-01), Kosmala et al.

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