Application: The machine can remove the water, gas and impurities in insulation oil high-efficiently, increasing the pressure force and quality of oil, make sure the electric device running safely. The machine is mainly used for electric power department and industries to deal with various oils such as transformer oil, mutual oil, switch oil and so on. The machine is especially for purifying the insulation oil in all kinds of large power equipments that are above 110KV. Advantage: Comparing with the single-stage vacuum oil purifier, this machine dewaters, degases and removes impurities more quickly, more completely and make the oils limiting voltage-withstand value much higher. As the bridge-type vacuum linking system that can filter and be an independent vacuum power supply, this machine can be vacuum treating the electric insulating devices.