Y-type filter is an indispensable filter device in the pipeline system of conveying medium. Y-type filter is usually installed at the inlet of pressure relief valve, pressure relief valve, constant water level valve or other equipment to remove impurities in the medium, in order to protect the normal use of valves and equipment. Y-type filter has the advantages of advanced structure, small resistance and convenient sewage discharge. The suitable medium of Y-type filter is water, oil and gas. The general water supply network is 18-30 meshes, the ventilation network is 10-100 meshes, and the oil supply network is 100-480 meshes. Basket filter is mainly composed of nozzle, supervisor, filter blue, flange, flange cover and fastener. When the liquid enters the filter blue through the main pipe, the solid impurity particles are blocked in the filter blue, while the clean fluid is discharged by the filter outlet through the filter blue.