... Vacuum Oil Recycling Machine 3.Double stage vacuum oil purifier Vacuum Oil purificationWorking Principle: The principle of vacuum evaporation ... purification of the oil by vacuum suction ,Vacuum Oil Purifier System, heated by the heater into the tank off , ... , control instrumentation, and piping system, etc. parts. ZJA series of two-stage Vacuum Oil Purifier Scope: Industry, Power petrochemical ...