The issue of pre-cooling during the first filling of liquid carbon dioxide spheres
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What are the requirements before filling a liquid carbon dioxide sphere tank for the first time? Is pre-cooling necessary?
It’s best to consult the manufacturer regarding this issue; the instructions also specify it. This requires exposure to cold, with the main considerations being the stress on the material and the rate of stress changes caused by mechanical processing due to temperature differences.
It is necessary to first perform displacement, and then use the low-temperature carbon dioxide gas from the cryogenic tank for pre-cooling; only after a suitable temperature is achieved should the liquid be introduced. Generally, liquid carbon dioxide is produced at a pressure of 25 kilograms and a temperature of around minus 15°C.