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. Generally, the water network is 18~30 mesh, the ventilation network is 10~100 mesh, and the oil network is 100~480 mesh. The basket filter is mainly composed of a pipe, a main pipe, a filter blue, a flange, a flange cover and fasteners. When the liquid passes through the main pipe into the filter blue, the solid impurity particles are trapped in the filter blue, while the clean fluid passes through the filter blue and is discharged through the filter outlet.