ZY vacuum transformer oil filtration machine works under the vacuum status, it is a basic requirement for vacuum oil purification machine, if the working vacuum reach to -0.095MPa, this machine can satisfy the degasification demand. If we use this kind machine to degassing and dewatering process for the insulating oil, the gas and water content will reduce. If the oil contains much gas, we can see it through the vacuum separator viewer, because the oil goes into the vacuum tank which is negative pressure, the gas will transgress under the press action. The transformer oil filtration machine can easy pump out those gas to air.