Electric transmitting & transformation in electric facility, such as transformer, current transformer,voltage transformer, high-voltage switch can not be oiled under normal pressure but filled in insulating oil in vacuum to guarantee safety operation. Insulating oil in these equipment may be vaporized, leaked, shrinked and reduced to bring risk. With long-period treatment experience on industrial high-purity transformer oil and turbine oil, we developed ZZ serial vacuum oiling machine to meet demands of various transformation and transmitting equipment.