Roll GmbH - cleaning with trichloroethylene and perchloroethylene.

Hermetically sealed solvent degreasing for use with
  trichloroethylene and perchloroethylene

Standard Features: Two indirectly heated solvent storage tanks Integrated distillation unit Automatic (pneumatic) chamber door with PPM interlock Integrated steam generator Elimination of all exhaust stacks Standard 200 micron filtration Up to 10 cycles per hour Regenerable MULTISOLVER activated carbon recovery system Vacuum tight treatment chamber with the option to programme static, rotating or oscillating component baskets 3 channel Metatron PPM system to monitor solvent concentrations in the chamber, MULTISOLVER and surrounding air PLC control system for concise programming - easy to use operator interface Meets all international compliance criteria including domestic German legislation and EN12921 - exceeds requirements of EU1999/13/EC - the "Solvent Emissions Directive" and the Solvent Emissions (England & Wales) Regulations 2004. Wide range of standard sizes - special systems with working chambers up to 15 metres in length

Options/Accessories Ultrasonic agitation Pressure injection flooding Additional swarf filtration Fine filtration Automatic basket loading Additional boil down distillation Automatic basket lidding Spray or immersion inhibitor application Basket programme recognition

 

 

Process Description
The Karl Roll range offers flexible programmable component cleaning combining the benefits of zero atmospheric emission technology coupled with the proven consistent capability of chlorinated solvents

Typical cycle:

·         Pre-Cleaning - The treatment chamber is sprayed with hot solvent from holding Tank 1 via spray nozzles.  Recirculating solvent provides an initial clean removing gross contamination from component parts which is then transferred directly to the distillation unit.  The process of distillation separates soils from the solvent, isolating it in the still for removal when required.  Cleaned and purified solvent vapour is condensed and transferred to holding Tank 2 for use later in the process.  Vapour is also made available for final cleaning.

·         Immersion Cleaning – The chamber is flooded with hot solvent from T1 to fully immerse the components.  This is essential when cleaning large quantities of small, tightly packed component parts and will also ensure that complex component geometries such as fine threads and blind holes are thoroughly flushed out to remove all traces of contamination including particulate matter. The options of high pressure solvent injection flooding and (or) ultrasonic agitation are also available for high/difficult levels of contamination.

·          Rinsing - Clean solvent distilled into T2 is sprayed into the treatment chamber to give the parts a final liquid rinse.

·         Vapour rinsing - Hot solvent vapour is released into the treatment chamber from the distillation unit. This condenses onto the colder component parts providing a pure rinse and consequently heating them in readiness for the vacuum drying stage.

·         Vacuum drying - Rapid and effective drying is achieved by reducing the chamber pressure ensuring evaporation of the solvent from the component parts.

·         PPM Reduction - The vacuum is subsequently broken and the remaining vapour/air mixture is passed through the MULTISOLVER activated carbon recovery unit until the chamber concentration is below 1g/m3 (German legislative requirements and EN12921).

·         Carbon regeneration - At regular intervals the carbon unit is regenerated until all captured solvent has been liberated and returned to the solvent holding tanks.

The “intelligent” distillation unit monitors solvent/oil concentrations and automatically enters boil down mode when the appropriate level has been reached.  Residues are automatically transferred to the Safetainer waste system without operator input.