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, dielectric 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, series ZYD adds ROOTS vacuum system, second stage of separating system to improve the effect of purification which dewaters, degases and removes impurities more quickly, more completely and make the oils limiting voltage-withstand value much higher. This machine also can remove free, soluble water, carbon, free and dissolved gases and particulate matters from insulating oil effectively and rapidly. 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. Series ZYD utilizes coacervation technology, coalescing technology, separating technology and refined purification technology.