Transformer oil is vitally important for safe and efficient operation of many kinds of electrical equipment, such as power transformers. It is in an environment that leads to degradation of its dielectric strength over a period of time. When transformer works, the oil will be contaminated by water, gas, impurities and etc. Therefore, regular and proper transformer oil purification is indeed needed. The ZYD series High Vacuum Transformer Oil Purification Plant, made by ZHONGNENG Group, has provided a reliable solution for transformer oil purification.