This machine adopted advanced coalescing separation and automatic control technology, quickly and completely remove free water, dissolved water, gases and impurities etc from contaminated/waste oil, upgrade oil quality, recover viscosity, flash point, performance of light lubricating and turbine oil. Ensure the hydraulic system, dynamic system, lubricating system's normal operation. It is especially for oil field, mine, electric power, communication /traffic, manufacturing and the place where there are many lubricating and turbine oil needing removed plentiful and minimal water.