Patent ID: 6199599
Filing Date: 2001-03-13
Classification: B01J,B67D,C23C,F17C,Y10T

Abstract:
A method of purging a low vapor pressure chemical from a plurality of valves and lines within, a chemical delivery system having a chemical source container comprising:utilizing a first purge source to provide a first purging technique to remove chemical, gas, or contaminants from within at least some of the valves and lines;utilizing a second purge source to provide a second purging technique to remove chemical, gas, or contaminants from within at least some of the valves and lines; andutilizing a third purge source to provide a third purging technique to remove chemical, gas, or contaminants from within at least some of the valves and lines,wherein the first, second and third purge sources are separate from the chemical source container; andwherein each of the first, second and third purging techniques are different.