Basket filter is a filter with filter basket as filter element, which is used to filter particulate impurities in liquid, viscous body and gas, and protect pipes and accessories. Basket filter is usually installed at the inlet of equipment pressure reducing valve, overflow valve and liquid level control valve for pre filtration. It is used to filter the impurities in the filter medium and prevent particulate impurities from entering the channel and causing blockage, so as to protect the equipment pipeline and accessories on the pipeline (such as water pump, valve, etc.) from wear and blockage. It is widely used in petroleum, chemical, pharmaceutical, food and other industries