Diaphragm valve

Details Diaphragm valve Diaphragm valve

1996-06-27

1998-10-13

Lee, Kevin

Valves and valve actuation

Valve

Materials

251331, F16K 717

Patent

active

058201050

ABSTRACT:
In a diaphragm valve designed to seal with a metal diaphragm, corrosion resistance and strength of the diaphragm are improved by forming the diaphragm from a thin alloy sheet containing, by weight, 12.5-14.5% Mo, 20.0-22.5% Cr, 2.0-6% Fe, 2.5-3.5% W, 2.5% or less Co, 0.015% or less C, 0.08% or less Si, 0.50% or less Mn, 0.35% or less V, 0.02% or less P, 0.02% or less S and the remainder Ni. The thin alloy sheet is cold-rolled after annealing to enhance the strength of the diaphragm.

REFERENCES:
patent: 5186434 (1993-02-01), Nishimura et al.
patent: 5295662 (1994-03-01), Yamaji et al.
patent: 5678803 (1997-10-01), Shinohara et al.
patent: 5730423 (1998-03-01), Wu et al.

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