Austenitic stainless steel valve

Details Austenitic stainless steel valve Austenitic stainless steel valve

1998-07-01

2000-04-11

Chambers, A. Michael

Fluid handling

Line condition change responsive valves

Thermal responsive

137375, 251266, 251368, F16K 1738

Patent

active

060477261

ABSTRACT:
An austenitic stainless steel valve which is used at 100.degree. C. or higher is easy to operate at the beginning of use. The valve of the present invention has a valve body made from an austenitic stainless steel, and a stem adapted to be reciprocated to open and close the valve. The stem is made from a metal having a thermal expansion coefficient that is ten-thirteenths or less of that of an austenitic stainless steel. Such a metal may be a ferritic or martensitic stainless steel. With this arrangement, it is possible to restrict the compressive stress applied to the stem within an allowable stress for the material of the stem and thus to prevent the destruction of the seat or the bending of the stem. The valve can thus be used easily.

REFERENCES:
patent: 1442204 (1923-01-01), Wilson
patent: 2555262 (1951-05-01), Weinberg
patent: 4269391 (1981-05-01), Saito et al.
patent: 4529169 (1985-07-01), Johns et al.
patent: 4696324 (1987-09-01), Petronko
patent: 5454547 (1995-10-01), Brown

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