Seat ring with insert for butterfly valve, and manufacturing...

Details Seat ring with insert for butterfly valve, and manufacturing... Seat ring with insert for butterfly valve, and manufacturing...

2004-05-06

2009-12-29

Bastianelli, John (Department: 3753)

Valves and valve actuation

Rotary valves

Butterfly

C251S360000

Reexamination Certificate

active

07637478

ABSTRACT:
A seat ring has an insert for a butterfly valve configured so that an annular insert is fitted on the outer peripheral surface of the seat part in which there is provided a valve body fitting annular groove having side wall parts on both the upstream side and downstream side, wherein there are provided on the outer peripheral surface of the insert a step so that the outer diameter on the downstream side is smaller than the outer diameter on the upstream side and on the inner peripheral surface a locking projection, and the insert is fitted in an annular groove provided in the valve body fitting annular groove of the seat part.

REFERENCES:
patent: 3341170 (1967-09-01), Housworth
patent: 3502299 (1970-03-01), Phillips
patent: 3727883 (1973-04-01), Conners et al.
patent: 4006882 (1977-02-01), Bonafous
patent: 4259980 (1981-04-01), Muller
patent: 4516597 (1985-05-01), Ueda
patent: 4552332 (1985-11-01), Sonderegger et al.
patent: 5876015 (1999-03-01), Schaeffer et al.
patent: 61-130672 (1986-06-01), None
patent: 63-135663 (1988-06-01), None
patent: 4-019961 (1992-02-01), None
patent: 9-242884 (1997-09-01), None
patent: 9-273637 (1997-10-01), None
patent: 2972566 (1999-08-01), None

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