A process cycle explained


1) Goods are placed in a treatment chamber. The air inside the chamber is evacuated after the door has been securely closed.

2) CO2 is the introduced into the cleaning chamber from the internal storage tank.

3) Depending on type of process, the additives are pumped in under pressure and mixed with the liquid CO2 in the treatment chamber. The goods can either be rotated in the treatment chamber or held still by pumping the CO2 past the goods. The operating temperature is generally around 8 to 25 degrees Celsius. Due to the high gas phase density, the objects will flow very gently if rotated compared to other methods. Mechanical abrasion is avoided.

4) Liquid CO2 is then transferred to a recovery unit, which separates the CO2 from any additives or dissolved grease . The CO2 is evaporated and condensed and transferred back clean to the internal storage tank. Thanks to the patented recovery process, CO2 can be distilled very efficiently with a very low energy consumption. In some applications the additives will be recovered as well.

5) Depending on the application, step 4) is repeated with our without additives

6) The pressure in the treatment chamber is lowered down to atmospheric pressure and transferred back to the storage tank via the recovery unit. In total, approximately 98.5% of the CO2 used is recovered.

7) At atmospheric pressure the door can be opened and the goods be taken out. Goods will come out completely dry and without any odor. No drying process is necessary and the goods are at no stage during the process subject to higher temperatures than 30 degrees Celsius.




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SiOx Machines AB Hörnåkersvägen 10 SE-183 65 Täby Sweden

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