A METHOD FOR PRODUCING A STERILE CRYOGENIC FLUID FROM A CRYOGENIC GAS BY STERILIZING THE CRYOGENIC GAS AND USING A HEAT EXCHANGER TO LIQUEFY THE STERILE CRYOGENIC STREAM. THE DISCHARGE RATE OF THE STERILE CRYOGENIC FLUID IS CONTROLLED BY SIZING THE DISCHARGE ORIFICE AND SETTING A PREDETERMINED PRESSURE OF THE STERILE CRYOGENIC FLUID. FIG. 1.