Fluid handling – With leakage or drip collecting
Patent
1980-08-15
1982-05-04
Walton, George L.
Fluid handling
With leakage or drip collecting
251306, F16K 1226
Patent
active
043277659
ABSTRACT:
An improved butterfly valve having leak detecting means, the valve body having a flow passageway therethrough, and co-axial top and bottom shaft openings and a seat circumscribing the flow passageway, a disc having an uninterrupted circumferential sealing surface having two spaced apart circumferential sealing contacts providing a circumferential valley therebetween. An upper and lower shaft portion is received in the body shaft openings, one of the shaft portions being secured to the disc providing means of positioning the disc and one of the shaft portions having a passageway therein communicating with the exterior of the valve body, the disc having a passageway communicating with the disc circumferential valley and the shaft passageway so that fluid leakage past either one of the disc sealing contacts will be conducted exteriorly of the body as an indication of loss of valve integrity when the valve is in the closed position.
REFERENCES:
patent: 3026083 (1962-03-01), McLaren et al.
patent: 3043557 (1962-07-01), Stillwagon
patent: 3059897 (1962-10-01), Jensen
patent: 3473554 (1969-10-01), King
patent: 3612483 (1971-10-01), Pool
patent: 3837616 (1974-09-01), Castriota-Scanderbeg
patent: 4067352 (1978-01-01), Halpine
Ward James D.
Wilson Thomas A.
Dover Corporation
Walton George L.
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