Method and apparatus for storing and dispensing a liquid composed of oxygen containing mixture

DETAILED DESCRIPTION In accordance with the present invention, a method is provided for storing and dispensing a liquid consisting of an oxygen containing mixture to ensure that the liquid will contain no more than a predetermined concentration of oxygen.
In accordance with the method, the liquid is introduced into a container.
The liquid upon introduction has a known, initial concentration of the oxygen.
The liquid is then dispensed from a bottom region of the container and the container is maintained at a dispensing pressure no greater than a specific pressure without venting head space vapor from the container.
Liquid is prevented from being dispensed when the volume of the liquid remaining within the container is about equal to a hypothetical volume of the liquid in a saturated state that is calculated at the specific pressure to have the predetermined concentration of the oxygen.
The hypothetical liquid volume is that obtained by expansion of an initial volume of the liquid, in a saturated state and having the initial concentration, into a total volume of the container.
In another aspect, the present invention provides an apparatus for storing and dispensing a liquid consisting of an oxygen containing mixture that ensures that the liquid dispensed will contain no more than a predetermined concentration of oxygen.
The apparatus has a container adapted to receive the liquid.
The liquid has a known, initial concentration of the oxygen.
The container is provided with a bottom outlet for dispensing the liquid from a bottom region of the container.
A means is provided for maintaining the container at a dispensing pressure no greater than a specific pressure without venting head space vapor from the container.
A level detector is also provided for detecting a level of the liquid that is referable to the volume of the liquid.
A remotely activated valve is connected to the bottom outlet.
The remotely activated valve has a closed position to cut off the flow of the liquid from the bottom outlet