Butterfly value with offset stem

Details Butterfly value with offset stem Butterfly value with offset stem

1998-03-02

1999-11-09

Fox, John

Valves and valve actuation

Rotary valves

Butterfly

137375, F16K 122

Patent

active

059798700

ABSTRACT:
The present invention constitutes an improvement over U.S. Pat. No. 5,269,493, and other butterfly valves controlling the flow of hot gases or other fluids under high pressures or velocities by having the valve stem not centered in which there is either no deflection or the deflection of the butterfly valve and rotation of the valve stem is substantially reduced when in a closed position resulting in no or substantially reduced leakage of the disc in closed position with respect to prior art butterfly valves currently in comparable use.

REFERENCES:
patent: 3442488 (1969-05-01), Adams
patent: 3931955 (1976-01-01), Jacobs
patent: 4037819 (1977-07-01), Kindersley
patent: 4311166 (1982-01-01), De Feo

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