- Automatically regenerating pre-filter
- Automatically cleaned fine filter (option)
- Almost unrestricted usability with physically drying paints
- Long service lives
- Fast amortisation and simple handling
- Low residual dust values
- Only dry overspray as waste
RTS-Rotation – low-maintenance dry spray booth
Overspray dry separation demonstrates its strengths in practice above all when relatively large quantities of paint have to be processed and the overspray portion cannot be reduced any further.
Spray booth with dry separation are usually equipped with disposable filters or manually regenerative filters. These cause costs for spare filters, maintenance and disposal. In addition to that, operation has to be interrupted in order to exchange the filters. The ‘RTS rotation’ system was developed by ELT in order to reduce these costs and tooling times. Maintenance intervals and filter service lives are prolonged significantly in comparison with conventional systems due to the new brush pre-filtration.
How the ‘RTS-Rotation’ system works
Overspray separation in the RTS-Rotation system takes place by means of a pre-filter and a fine filter stage. The pre-filter stage is formed by vertical, slowly rotating brush rollers. The bristles present a very large total surface area and absorb the adhesive particles from the overspray. During the slow rotation, the paint particles can dry on the tips of the bristles. This results in slowly growing cakings on the bristles. Scrapers are mounted in the area behind the brush rollers that continuously remove these cakings from the bristles. The dislodged, hardened material falls into the drawers arranged under the brushes and can thus be simply disposed of. The dry paint dust may often be disposed of as ‘commercial waste’. The brushes otherwise require little maintenance and do not need to be exchanged or renewed.
The fine filter stage is formed by a special fleece filter, which is arranged above the brush rollers and must be manually maintained or exchanged in the standard version. The maintenance intervals depend on the paint material used. Automatic cleaning or an external fine filter with automatic cleaning is also possible as an option.
Over 10 years of operational experience shows that around 75 to 95% of the overspray is separated out by the pre-filter stage and the rest by the fine filter stage. The degree of separation depends strongly on the type of paint and the drying reactivity during the flying phase.
Use of the RTS-Rotation with the following paints
- 1-component / 2-component solvent-based paints
- 1-component / 2-component water-based paints
- Water-based UV paints
- Aqueous dispersion adhesive
- Primer for rubber materials.
Before practical use, the paints are tested and approved in ELT’s own pilot plant. Stove enamels and 100% UV paint systems cannot be used.
The horizontal version
Furthermore, it is possible to use the system as a horizontal underfloor extraction system. This version is used, for example, by a machine manufacturer for large parts. In addition, a drag conveyor with gulley extraction is used there in order to automatically transport the particles cleaned off the brushes out of the pit.
The RTS-Rotation system is particularly useful when relatively large quantities of paint with an unavoidable overspray portion have to be processed, as otherwise a great deal of residual waste would result using conventional technology. Compared to water-sprinkled spray walls and normal dry spray booths the amortisation period is shorter; it is frequently less than two years.