Oil vapor recovery system refers to the process of loading and unloading fuel or refueling vehicles, which collects volatile oil vapor, Through the methods of assimilation, adsorption or condensation etc, to reduces the pollution of oil vapor , or makes oil vapor change from gaseous state to liquid state and then to gasoline again, so as to achieve the purpose of recycling.

When the dispenser is operated to refuel, volatile oil vapor will overflow from the automobile fuel tank, and this kind of vapor will also be produced by the fuel flow.Vacuum Fuel Pump will work at this time to extract the vapor and inject it into the pipeline which connected with the oil tank for further treatment.