ZYD double stages vacuum transformer oil filtration machine can quickly take off the harmful ingredients in the insulating oil such as water, impurities, gas, and acetylene, hydrogen, methane, to improve the insulation performance of the oil so that it can effectively guarantee the electrical equipment working safety. The transformer oil filtration machine is also used for transformer vacuum drying and oil-filling, which is good for mounting, repairing and operating high-voltage equipment with voltage up to 1150 KV.