VFD(insulation oil purifier,oil recycling,oil purification,oil filtration, oil filtering, oil treatment,oil regeneration, oil recovery,oil purifying) series is mainly used to improve the properties of insulation oil. It can remove water, gas, particulate matters etc. from the insulating oil effectively and rapidly so as to boost performance of transformers, circuit breakers, mutual inductors, cable and capacitors which has insulation system. VFD oil filtration series is specialized in purifying branded oil, insulating oil of high voltage and super high voltage transformer. Additionally, it is suitable for treating low viscosity lubrication oil