Water from the entrance, first through the coarse mesh filter out larger particles of impurities, and then reach the fine strainer. In the filtering process, fine-mesh gradually accumulate dirt and impurities in the water, filter impurities layer is formed, due to the impurities accumulate in the inner side fine filter, so that in fine mesh inner and outer forms a pressure difference on both sides.
When the filter pressure difference reaches a preset value, will start the automatic cleaning process, during which water supplies are drying up, purge valve open, cleaning in the room and the suction pressure dropped substantially, through the filter pressure difference between the cylinder and the suction pipe, suction pipe with the washing room through a suction nozzle, forming a suction process. Meanwhile, electric motor driven suction tube axial spin campaign. Sewage pump axial movement combined with the rotary motion of the entire filter surface is completely clean. The whole washing process only takes a few seconds. Drain valve cleaning the close at the end. Filters began to prepare for the next washing cycle.