... reference. (oil filtration, oil purification, oil treatment, oil purifier, oil recycling, oil processing, oil filtering, energy saving, oil regeneration, oil processor, oil filter, oil process, oil purify,oil regenerating, oil restoration, waste oil disposal, oil reclaimed ... %≤0.1Impurity sizemicron≤0.5 (no free carbon) Vacuum transformer oil purification equipment series ZYD