How do co-solvent and bi-solvent vapor degreasing processes work for difficult soils?

Some soils, such as no-clean fluxes, heavy machining oils, or baked-on residues, are too stubborn for a single-solvent vapor degreaser. In these cases, co-solvent or bi-solvent processes can provide the cleaning power needed:

• Co-Solvent Process: Uses a blend of a solvating agent and a fluorocarbon rinse agent. Parts are immersed in a boiling sump with the blended co-solvent to dissolve soils, then rinsed in a separate sump with pure, distilled fluorocarbon to remove any remaining contaminants, and finally dried in the degreaser’s vapor zone. This ensures strong cleaning action while leaving a residue-free, fast-drying finish.
• Bi-Solvent Process: Cleans difficult soils by using two different solvents in a three-step process: a preliminary soak in heated solvent for initial cleaning, followed by a vapor rinse in a traditional two-sump degreaser using a different, lower-boiling point solvent, and finally drying the parts in the degreaser’s vapor zone.
• Key Benefits: Both approaches deliver enhanced solvency for tough soils while maintaining the safety, nonflammability, and low-emission advantages of vapor degreasing.

To learn more about bi-solvent or co-solvent processes, see our page Bi-Solvent and Co-Solvent Vapor Degreasers.

At Best Technology, our engineers help you evaluate whether a co-solvent or bi-solvent process is the right fit, and guide you through validation so your cleaning system stays effective and efficient.