Patent ID: 6047726
Filing Date: 2000-04-11
Classification: F16K,Y10T

Abstract:
A valve comprising:a valve body made of an austenitic stainless steel;a stem provided in said valve body, said stem being axially movable in said valve body, and said stem having a first end and a second end;a disk provided on said first end of said stem;a valve seat provided in said valve body and arranged opposite said disk;a yoke having a first end and a second end, said first end of said yoke being connected to said valve body, said second end of said yoke engaging said second end of said stem so that said stem is axially movable toward and away from said valve seat; andsaid stem being made from a metal having a thermal expansion coefficient that is ten-thirteenths or less of a thermal expansion coefficient of said austenitic stainless steel.