Break up the refueling gun and teach you to know the gun

On tankers, refueling hose only transportation fuel, fuel pumped by pump from underground tank inside the machine, through the oil and gas separator, flow meter to electromagnetic valve, finally through the oil tank gun to the car. Conventional tankers is used in the self-styled oil gun, this kind of oil gun on the inlet nozzle structure is designed, many netizens think ordinary self-styled oil gun of the air inlet is used to "steal", "gas", actually otherwise, the self-styled oil gun on this self-styled inlet pipe connection device, the intake pipe is actually oil gun "switch", once the oil (or oil bubble) on the submerged inlet pipe, the self-styled device will shut down oil gun to stop the oil supply.