Ventilation valve for the fuel tank of a motor vehicle

摘要

The valve has a ventilation opening (6) and a float gauge (14) that is arranged in housing (2), where the float gauge supports a three-stage sealing mechanism (13), which cooperates with the opening. The float gauge is movable towards a central longitudinal axis of the housing. The sealing mechanism has a set of carriers (36, 37) arranged one behind the other along the longitudinal axis and are penetrated by a passage channel (35) that runs coaxial to the longitudinal axis.