PL series plate pressure oil purifier is mainly used to separate the tiny impurities from the oil, or to filter vegetable oil if it is made of stainless steel in power factories, power stations, transformer substations of industrial and mining enterprise, lubricating oil warehouses, tractor stations as well as petroleum, chemical industry, metallurgy, and national defense units, etc. There are filtering media,such as filtering paper or filtering fuse, installed between the plastic filter board and filter plate that will be fixed to form a single filtering room under the pressure of the packing device. The filtering paper or filtering fuse packed between the filter board and filter plate will play a role of filtering. It's characterized by simple structure, easy operation, low cost, etc.