Degreasing Features:

  • Liquid CO2 penetrates small crevices;
  • Successful in various cleaning geometries;
  • Dry – waterless cleaning – no external drying required;
  • Batch cleaning process for multiple parts in a single load;
  • Cleaning adjuncts: additives, ultrasonics, centrifugation, jets;
  • Liquid CO2 used for degreasing is distilled and reused for subsequent loads.
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LCO2 Degreasing from Intricate Tiny Devices

Liquid CO2 degreasing / cleaning combines unique centrifugal dry washing and rinsing processes using specially formulated additives with recycled carbon dioxide in a tunable cleaning solvent system. An ideal cleaning solvent system would exhibit both low surface tension and high solvent power. An elegant solution has been developed for the centrifugal CO2 cleaning process that overcomes the apparent limitations of these two constrained solvent schemes; a “tunable solvent system”. Liquid CO2 is more suited as a solvent for less complex contamination but very effective for penetrating complex substrate geometries. CO2 is also an excellent drying or rinsing agent (as a solvent) for more powerful washing agents. Moreover CO2 may be used to modify solvents to produce a COexpanded cleaning agent, which exhibits much lower viscosity and surface tension, without compromising the solvent power of the system.

All CO2 process fluids are automatically transferred and recovered using an integrated fluids management and recycling subsystem consisting of a still/purifier, storage tank and condenser system. A gross rinse recovery system continuously recycles gross rinse solvent to remove residual additive and contaminant build-up, which is discharged periodically from the system. The recovered CO2 is transferred into both the gross rinse tank and final rinse tank for reuse. The system is capable of recovering up to 95% or more of the CO2 for reuse. Ultrafiltration, liquid carbon dioxide washing and a pre-programmed distillation procedure maintains optimal quality of the pre-wash agent. Systems can be optionally equipped with ultrasonics, jets, and a wide variety of process sensors to monitor the cleaning process.