... ,Dielectric Oil Purifier Unit: 1.Double stages oil processing system. 2.Flash distillation. NK Vacuum Transformer Oil Purifier ... ultimate vacuum value ≤ 5Pa3. Multi-stage precision filtration system, mesh filtration combined with molecular adsorption technologies4. Duplex-Stereo ... water, gas from oil.5. Efficient electric heating system, heating uniformity, less power consumption, safe, and reliable ...