Tank connecting piece, has low pressure-high pressure valve standing in connection with chamber on one side and with atmosphere on other side, and opened for reduction of pressure difference between chamber and atmosphere in direction

摘要

The connecting piece has an external wall (1) and an inner wall (2). A chamber (19) is closed against a surrounding area in operation and is opened for fueling. A low pressure-high pressure valve (20) is provided for pressure balancing during closing of the chamber. The valve is arranged in an annular space (18) formed between the external wall and the inner wall. The valve stands in connection with the chamber on one side and with atmosphere on other side. The valve is opened for reduction of a pressure difference between the chamber and the atmosphere in a direction.