VALVE FOR MEASURING AN EXTREMELY LOW TEMPERATURE WITH A VACUUM INSULATION FUNCTION CAPABLE OF CUTTING OFF RADIANT HEAT AND CONVECTIVE HEAT

摘要

PURPOSE: A valve for measuring an extremely low temperature with a vacuum insulation function is provided to semi-permanently maintain the insulation function of the valve using a semi-permanent insulation case. ;CONSTITUTION: A valve for measuring an extremely low temperature with a vacuum insulation function comprises a vacuum insulation structure. The vacuum insulation structure is composed of a valve body(1), a spindle washer(2), spindle seals(3,4), a spindle(5), a spindle cap(6), a handle(7), a tablet(8), a spring washer(9), a nut(10), first bushings(11) for welding, a second bushing(12) for vacuum brazing, and vacuum cases(13). The vacuum insulation structure is formed through a vacuum brazing method which connects the valve body and the vacuum cases.;COPYRIGHT KIPO 2011