These high vacuum oil purifiers perform the function of upgrading and reconditioning of insulating oil by means of removing impurities such as dust, gas, sludge, water etc. The major operation is heating, filtering, degassing and dehydration. After recycling, it can boost performance of transformers, circuit breakers, mutual inductors, cable and capacitors which have insulation system. This oil purifier machine specializes in purifying insulation oil such as transformer oil, cable oil, switch oil ect. of high voltage and super high voltage power appliances. Additionally, this series also are suitable for treating low viscosity lubrication oil.