... operate 2.Vacuum Oil Recycling Machine 3.Double stage vacuum oil purifier Vacuum Oil purificationWorking Principle: The principle of vacuum evaporation ... of water vapor and gases emitted by the vacuum pump, dehydration, after degassing of oil into the ... , filters, vacuum de-gas cylinders, observation holes, defoaming device, Liquid level control, discharged pumps, condensers, vacuum pumps, electrical ...