Y-type filter is an indispensable filter device for the pipeline system of conveying medium, Y-type filter is usually installed at the inlet end of pressure reducing valve, pressure relief valve, water level valve or other equipment, which is used to remove impurities in the medium to protect the normal use of valves and equipment. The Y-type filter has the characteristics of advanced structure, low resistance and convenient sewage discharge. The applicable medium of Y-type filter can be water, oil and gas.