... transformer oil, mutual inductor oil, switch oil and so on. Series ZY can remove water, trace water, gas, particles from oil ... water, gas from oil. 2. Multi-stage precision filtration system, mesh ... ZY-high effective vacuum transformer oil purifier, oil filtration 2.ZYD-Double stages insulating oil purifier, oil treatment, oil purification 3.ZYM-Mobile/trailer type transformer oil treatment, oil ...