... recycled oil quality 4.Vacuum distillation equipment for used oil This DIR-VIII vacuum distillation machine was installed ... transfer pump;2,Blending system:catalyzing treatment tank,blender,vacuum system;3,Distillation system:distillation tower,distillation kettle, ... reservoir,first stage cooler,second stage cooler;5,Vacuum system:vacuum cooler,vacuum water tank,vacuum pump set;6,Oil storage system: ...