Usage: It is mainly used to precision filtration of solid impurities from all kinds of motor oil, lubrication oil and insulation oil; as well as for long distance and high lift oiling. Features: 1. This machine has three classes filtration, which respectively pre-filter, intermediate filter and fine filter. 2. Portable and flexible, and it is designed looks like go-cart for easy to operate. 3. Environment-friendly and energy-saving, without filtration paper and will not pollute the location. 4. There is a wider usage and longer life-span compare with ordinary pressure oil purifier. Note: It is a update product based on plane pressure filter. this machine is an ideal substitute of the board-frame oil purifier and the centrifugal oil purifier.