Automatic cleaning filter can high filtering efficiency, can realize online automatic cleaning, automatic blow down functions, operation equipped with differential pressure / time / manual three functions, to provide stable water quality guarantee for your water system. Its working principle is: when the water into the inner cartridge of self cleaning filter , impurities were intercepted in the inner wall of filtering barrel , clean water is filtered out of the water outlet, when the impurity in the filter cylinder wall accumulated more and more, self cleaning filter pressure between inlet and outlet reaches a preset value or reach the cleaning time or manual prefabricated, filter will begin the cleaning process, the whole self cleaning process include two steps: open the drain valve in the automatic self-cleaning filter ; the motor drives the cleaning brush in self cleaning filter screen, the impurity intercepted from the screen discharged from blow down valve , system does not stop when cleaning, the whole operation the process of cleaning filter controlled by an intelligent control box equipped with. Control mode can choose pressure difference, time, manual and PLC control.