The filter is used to prevent the solid particles in the filtered medium from entering the subsequent pipeline. After the medium enters the filter element of a certain size from the filter inlet, its larger solid particles or impurities remain in the filter element, and the filtered medium flows out from the outlet , Meet the requirements of use. When the pressure difference between the front and back of the filter exceeds the requirements or the filter element is damaged, just remove the filter element, clean it or replace the filter element, and reinstall it before use.