Chemical Focus
For Dowper MC as well as for Dowclene 1601, Safechem offers test kits that allow users to easily check the solvent quality. When it comes to deciding which solvent is optimally suited for the cleaning task in question, the oil compatibility tests and solvent analysis of the Chemaware lab-services enable a sound decision.
Temporary corrosion protection Before reaching their point of use, parts travel thousands of kilometres by ship, plane or train. Hence they must be effectively protected from corrosion. Solvents have been established as a reliable and cost-effective alternative in this regard. Dowper MC or Dowclene 1601 is therefore mixed with a standard commercial, solvent-free concentrated preservation product and then applied to the part after cleaning. This step can be integrated into the cleaning machine or performed as a single step in a separate system. From the time when solvents were used in open cleaning machines, they are partly stigmatised from the environmental point of view in industrial parts cleaning. However, for many years, solvents can be used in
Should you clean with solvents or aqueous media? Type of contamination, material and geometry are essential factors.
The closed-loop Safe-Tainer system ensures safe and emission-free supply and take-back of solvents.
Safechem Europe is a subsidiary of The Dow Chemical Company.
closed-loop systems that support their environmentally sound and sustainable handling. This includes completely closed cleaning machines, which operate under full vacuum and fulfill the requirements of the VOC Directive (Volatile Organic Compounds). The machines are usually equipped with an integrated distillation system. It provides continuous reconditioning of the solvent, thus enabling a long solvent operating life and low consumption. Additionally the cleaning machines
are mostly equipped with heat recovery systems for reclaiming the thermal energy associated with distillation. The Safe-Tainer system developed by Safechem significantly contributes to the environmentally sound operation. The system contains two different, double- walled containers – one for the delivery of virgin solvent, the other one for take-back of the used cleaning agent. In combination with a closed cleaning machine, the Safe-Tainer system enables virtually emission-free cleaning processes with solvents. Choosing the cleaning agent
according to the principle ‘equal solves equal’, does not only offer technical and economical, but also ecological advantages. n
Fig. 4. Chemaware lab services help to make a sound decision for a cleaning technology and support high process security and – optimisation.
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Fig. 5. The Safe-Tainer system for safe handling and using solvents in a closed-loop, with service elements for maintaining the cleaning process.
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