Automatic backwash filter is mainly composed of filter housing, stainless steel filter screen, electric blowdown valve and blowdown device. When the water filter is working, the backwash butterfly valve plate is opened, and the water enters the filter element from the inlet, then flows through the filter screen, and then flows out of the system, and the impurities are intercepted inside the filter element. When the water filter needs to sewage, you can close the butterfly valve plate and open the sewage valve.