... used for purifying the insulating oil, transformer oil, mutual oil, switch oil, dielectric oil and so on. Application: It is mainly used for purifying the insulating oil, transformer oil, mutual oil, switch oil, dielectric oil ... oil purifier/ Transformer oil purifier/ Dielectric oil treatment1.1. Series ZY: Zhongneng vacuum Insulation oil purifier1.2. Series ZY-A: Zhongneng Vacuum Insulation oil ...