Butterfly valve

Details Butterfly valve Butterfly valve

1997-09-25

2000-03-28

Fox, John

Valves and valve actuation

With means to increase head and seat contact pressure

With positive reduction

251162, F16K 124

Patent

active

060420839

ABSTRACT:
A butterfly valve is disclosed, wherein a pair of rotating shafts for rotating a disk. One of the shafts is used to rotate the disk by 90 degree, the other is used to linearly displace the disk, thereby tightly depressing the disk on the valve seat to completely prevent the leak.

REFERENCES:
patent: 2919885 (1960-01-01), Daigle
patent: 3141648 (1964-07-01), White
patent: 4013264 (1977-03-01), Friedell

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