Patent ID: 6260568
Filing Date: 2001-07-17
Classification: F17C,F17D,Y10T

Abstract:
An automatic switching gas supply system comprising:a main gas supply source,at least one auxiliary gas supply source,a main gas supply conduit connecting in fluid communication at a first end with said main gas supply source and at a second end with a process machine, said main gas supply conduit further comprises a first pressure regulator connected in line for allowing a gas having a first pressure to pass said main gas supply conduit further comprises a first main gas supply conduit connecting said main gas supply source to said process machine through a three-way flow control valve, and a second main gas supply conduit connecting said main gas supply source to said process machine through a pressure regulating valve, andat least one auxiliary gas supply conduit in fluid communication at a first end with said at least one auxiliary gas supply source and at a second end with said process machine and said main gas supply conduit in a parallel manner, said at least one auxiliary gas supply conduit comprises at least one second pressure regulator connected in line for allowing a gas having a second pressure to pass, said second pressure having a pressure differential of at least 0.5 Kg/cm.sup.2 smaller than said first pressure such that only when said first pressure decreases by at least said pressure differential, said gas supply system switches automatically to said at least one auxiliary gas supply source so that gas being supplied through said at least one auxiliary gas supply conduit into said process machine.