Gravity-fed low pressure cryogenic liquid delivery system

Details Gravity-fed low pressure cryogenic liquid delivery system Gravity-fed low pressure cryogenic liquid delivery system

1985-01-24

1985-12-31

Capossela, Ronald C.

Refrigeration

Storage of solidified or liquified gas

With measuring

62 55, 137436, 137587, 137592, F17C 1302

Patent

active

045612587

ABSTRACT:
A system for delivering cryogenic liquids at controlled low pressures is disclosed, wherein the liquid is withdrawn from the bottom of a container, and allowed to flow by gravity to the point of use. The system comprises an inlet conduit which directs a liquid cryogen into the container. The inlet conduit is connected to a float valve assembly which regulates the height of the liquid in the container. The vertical position of the float valve assembly is adjustable. The liquid cryogen is withdrawn from the bottom of the container, through an insulated outlet conduit. The pressure of the output liquid is determined by the vertical distance between the lower end of the outlet conduit and the liquid level in the container. Adjustment of the position of the float valve assembly therefore controls the output pressure. Gas bubbles that may form in the liquid tend to rise to the top of the container, so that the output is of a single phase, that is, an essentially pure liquid.

REFERENCES:
patent: 1711272 (1929-04-01), Lueders
patent: 1872831 (1932-08-01), Siems
patent: 3097498 (1963-07-01), Williams
patent: 3272238 (1966-09-01), Groppe
patent: 3605424 (1971-09-01), Paine
patent: 3803858 (1974-04-01), Simon
patent: 3858404 (1975-01-01), Davis
patent: 3938347 (1976-02-01), Reidel
patent: 4059424 (1977-11-01), Bentz
patent: 4192147 (1980-03-01), Gilbert et al.

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