Controlled delivery of filtered cryogenic liquid

Details Controlled delivery of filtered cryogenic liquid Controlled delivery of filtered cryogenic liquid

1994-09-20

1996-09-24

Kilner, Christopher

Refrigeration

Storage of solidified or liquified gas

Liquified gas transferred as liquid

62908, 62 78, F17C 702

Patent

active

055579248

ABSTRACT:
A system for delivering a controlled stream of purified liquid cryogen from an outlet. The system includes a cryogen delivery flow path that is made up of a delivery conduit connecting a source of liquid cryogen to the outlet. A cryogen purifier positioned in a section of the conduit, is capable of purifying (sterilizing) liquid cryogen flowing therethrough, and a section of the delivery conduit downstream of the cryogen purifier is clean (sterile). The system also includes a cleansing flow path for cleansing (sterilizing) the cryogen purifier and the clean delivery conduit section. The cleansing flow path includes a cleansing conduit connecting a source of cleansing (sterilizing) medium to the delivery conduit and the cryogen purifier. The cryogen purifier and clean delivery conduit section are isolated from the cryogen source during conduit cleansing, and cleansing is accomplished without subjecting the cryogen source to the cleansing medium.

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