Gasoline evaporates extremely rapidly. It is a volatile substance with very weak molecular bonds, meaning it can become a gas even at room temperature. This is why vapor recovery at fuel stations is so important. Without it, the atmosphere around the pumps would quickly become dense with vaporized fuel, causing a risk of explosion, and sending these harmful greenhouse gases into the atmosphere.
Cleaner Air at the Fuel Pump
Vapor recovery with vacuum
All fuel stations have a certain smell. This heady aroma is vaporized gasoline, a highly volatile substance that is as bad for the health of those around it as it is for the environment. Many countries now require fuel stations to recapture these vapors during refueling. Vacuum pumps from Busch are used to return them to the underground fuel storage.
Gasoline evaporates extremely rapidly. It is a volatile substance with very weak molecular bonds, meaning it can become a gas even at room temperature. This is why vapor recovery at fuel stations is so important. Without it, the atmosphere around the pumps would quickly become dense with vaporized fuel, causing a risk of explosion, and sending these harmful greenhouse gases into the atmosphere.
Gasoline evaporates extremely rapidly. It is a volatile substance with very weak molecular bonds, meaning it can become a gas even at room temperature. This is why vapor recovery at fuel stations is so important. Without it, the atmosphere around the pumps would quickly become dense with vaporized fuel, causing a risk of explosion, and sending these harmful greenhouse gases into the atmosphere.
How does a car’s fuel tank know when it is full?
Anyone who has filled up a car’s fuel tank knows the sound and feel – the audible and tangible “clunk” the nozzle makes when the tank reaches capacity. But how can the fuel pump know when to stop? A small but effective mechanical system ensures that motorists never overfill their vehicles. At the very tip of the nozzle, there is a small hole with a tube behind it. This is a venturi valve. As the tank is filled, air inside the tank is displaced and flows through this valve on its way through the vapor recovery system. The valve constricts the airflow slightly, meaning that the tube has a different pressure on either side. When the tank is full of fuel, liquid blocks the inlet, and air stops flowing. This causes a vacuum in the venturi valve. The change in pressure pulls a valve in the fuel line closed and stops the flow of fuel, letting the driver know their vehicle is ready for the open road.
Anyone who has filled up a car’s fuel tank knows the sound and feel – the audible and tangible “clunk” the nozzle makes when the tank reaches capacity. But how can the fuel pump know when to stop? A small but effective mechanical system ensures that motorists never overfill their vehicles. At the very tip of the nozzle, there is a small hole with a tube behind it. This is a venturi valve. As the tank is filled, air inside the tank is displaced and flows through this valve on its way through the vapor recovery system. The valve constricts the airflow slightly, meaning that the tube has a different pressure on either side. When the tank is full of fuel, liquid blocks the inlet, and air stops flowing. This causes a vacuum in the venturi valve. The change in pressure pulls a valve in the fuel line closed and stops the flow of fuel, letting the driver know their vehicle is ready for the open road.