Plug valve construction

Details Plug valve construction Plug valve construction

1979-12-05

1980-11-18

Cline, William R.

Fluid handling

With leakage or drip collecting

251214, 137860, F16K 2300, F16K 504

Patent

active

042340110

ABSTRACT:
An improved plug valve is of the type that includes a valve body having a bore extending therethrough and a pair of passages intersecting the bore and being substantially normal to the axis of the bore. A valve plug is disposed within the bore for selective rotation between an opened and a closed position to respectively align and misalign a port through the plug with the passages. A first circumferential sealing member between the plug and the bore above the port and the passages and a second circumferential sealing member between the plug and the bore below the port prevents fluid from escaping from an interior of the plug valve and balances fluid pressure acting on the plug. A circumferential sealing device around the top of the plug prevents ingress of foreign matter into the region of the bore above the first sealing member.

REFERENCES:
patent: 2790597 (1957-04-01), Turpin
patent: 3493270 (1970-02-01), Doerfler
patent: 3751003 (1973-08-01), Kass
patent: 4047275 (1977-09-01), Bake et al.
patent: 4171711 (1979-10-01), Bake et al.

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