Balanced plug valve

Details Balanced plug valve Balanced plug valve

2005-08-30

2005-08-30

Bastianelli, John (Department: 3751)

Valves and valve actuation

Balanced valves

Reciprocating

C137S614180, C251S121000, C251S214000, C251S325000, C251S330000

Reexamination Certificate

active

06935616

ABSTRACT:
A balanced plug valve having substantially reduced shut-off force requirements due to an integral dual seating arrangement of the valve plug within a valve housing having slanted inlet and outlet ports and wherein the inlet port forms an elliptical opening for fluid control which is selectively exposed by a cylindrical portion of a sliding valve plug.

REFERENCES:
patent: 208986 (1878-10-01), Patterson
patent: 2370371 (1945-02-01), Pratt et al.
patent: 3761053 (1973-09-01), Bedo et al.
patent: 3873063 (1975-03-01), Illing
patent: 6047718 (2000-04-01), Konsky et al.
patent: 6089255 (2000-07-01), Bonnefous et al.
patent: 6494229 (2002-12-01), Kajitani

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