Carbon dioxide solvent cleaning machine (spray)
EcoCO2 Dürr - Ecoclean

Used at the appropriate temperature and pressure, CO2 exhibits optimum oil-dissolving properties. Unlike conventional "snow jet" cleaning systems in which CO2 is converted into solid ice crystals acting as a blasting medium, the new EcoCO2 uses carbon dioxide in both its liquid and supercritical states. Liquid CO2 is fed into the system and rendered supercritical - a state in which it has the density of a liquid but the viscosity of gas - by raising its temperature and pressure. The medium can thus penetrate even minuscule pores and inclusions to remove foreign matter.

Following the cleaning cycle, the CO2 may be returned into the circuit or discharged from the system. Prior to this step, the foreign matter removed from the part and the CO2 are fully separated from each other, and no cleaning agent residue remains present on the cleaned part. The parts have room temperature upon exiting the EcoCO2. They are dry, free of any residues and ready to undergo further processing immediately.