The porous walls of the filter brick (monolith) have a distribution of fine pores that are carefully controlled in the production process. The total porosity of the material is usually from 45 to 50% or more, while the average pore sizes are usually from 10 to 20 μm. The hydrodynamic method of cleaning DPF filters presses the water based solution from the outlet channels to the inlet channels through the porous walls dividing the filter channels. That is why the quality of water based solution is so important.
DPF filter cleaning machines operated in a closed circuit, which means that we use the same water based solution all the time in the cleaning process. Dirty water flowing out of the DPF during cleaning is filtered every time before refilling the filter over again.
When designing filter cartridges, we took into account not only the degree of accuracy in microns, but also its efficiency in percentage. On the market you can find filter cartridges that have a very good filtration accuracy of 1μm, but do not guarantee efficiency at a level greater than 20-30%.
OTOMATIC filter cartridges very effectively stop the smallest soot and ash particles, with a size several dozen times smaller than the size of a grain of sand.