Back-flushing filters can be applied for a variety of purposes, e.g.
The contaminated cooling lubricant is cleaned in a single-chamber or multi-chamber system by flushable filter cartridges. The back-flushing takes place without reducing the flow rate. The medium to be filtered flows from the sieve or slot tissue through the filter cartridges. Thereby, dirt particles contained in the cooling lubricant are hold and filtered out.
After the set differential pressure has been achieved or the maximum filter time has expired, a compressed-air-supported back-flushing of contaminated cartridges is carried out. This CL dirt suspension is forwarded to a secondary filtration. The flushed cartridges can be used for filtration again. Depending on the application, mesh width of the back-flushing filter cartridges for nominal filtration rates varies between 20 µm and 60 µm (retention rate approx. 90 %).