... the used oil including gasoline, diesel, gas engine oil, diesel engine oil, and other lube oil no matter mineral ... 1-2 persons required.1.Working principle of used oil cleaning equipmentThis equipment adopt physicochemical actions to polymerize, passivate, ... kettle, heater, circle pump; d. Cooling system: refrigerating equipment, water pump, water tank, cooler I,cooler II, Condenser; e. Vacuum system ...