Valves and valve actuation – Valve – Materials
Patent
1991-11-14
1992-12-15
Chambers, A. Michael
Valves and valve actuation
Valve
Materials
251361, F16K 506
Patent
active
051709937
ABSTRACT:
Ball valve for fluids, with sealing seat comprising rings, disposed between the spherical surface of the valve and the interior of the valve body, composed of rings formed of superimposed layers of plates of graphite alternating with plates of stainless steel sheet, the whole being contained in a casing of metal sheet covering the outer sides of the seat, except the one in contact with the spherical sealing surface.
REFERENCES:
patent: 556037 (1896-03-01), Weiss
patent: 1246787 (1917-11-01), Rosner
patent: 2369025 (1945-02-01), Cummings
patent: 3863889 (1975-02-01), Robinson et al.
patent: 4006881 (1977-02-01), Gaillard
patent: 4269391 (1981-05-01), Saito et al.
patent: 4936546 (1990-06-01), Berchem
Cesare Bonetti S.p.A.
Chambers A. Michael
Dubno Herbert
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