A tank system (100) for a hydrogen powered vehicle, wherein the tank system (100) comprises at least one cylindrical tank container (200) for storing a gaseous medium and a valve device (4), wherein the at least one tank container (200) and the valve device (4) are operatively connected and fluidly connected to one another, wherein the at least one tank container (200) has a tank container interior (2), wherein the valve device (4) has a flow device (6), which flow device (6) is at least partly arranged within the tank container interior (2) such that the tank container interior (2) can be filled with a gaseous medium, wherein the flow device (6) has a bypass (12) with a first branch (8) and a second branch (9), said first branch (8) being arranged coaxially to a longitudinal axis (14) of the tank container (200) and said second branch (9) having a longitudinal axis (140) arranged in an angular range a between 15 degrees and 60 degrees relative to the longitudinal axis (14) of the tank container (200), wherein deflecting elements (5) are arranged in the tank container interior (2) such that a flow of the gaseous medium can be deflected.