As transformer oil is oxidized and carbonized, it will effect the insulation performance badly. In order to achieve optimal dielectric strength, ZY single stage insulating oil filtration machine builds the high effective vacuum system and multi-stage precision filtering system, which can separate solids, water, trace water, gas from oil quickly. This vacuum oil filtration machine is widely applied in power generation plants, transformer stations, electric transmission, industrial and mining enterprises, railway transportation for purifying the unqualified transformer oil, mutual inductor oil, switch oil, circuit breaker oil,cable oil. ZY insulating oil filtration machine also has the functions of vacuum drying, vacuum filling and live line work on the spot.