Vent valve unit for a vehicle fuel tank has wave protection valve in air feed pipe which closes when fuel level exceeds given value

摘要

The vent valve unit for a vehicle fuel tank comprises a rollover valve (3) which closes the vent pipe (4) when the vehicle is at an extreme angle and an air feed pipe (2) connected to the rollover valve. A wave protection valve (7) closes when the fuel level exceeds a given value.