A valve system has at least one actuated valve device (10) for controlling various fluid ports (15, 16, 17) of a valve housing (18). The valve housing has a receiving space (20) forming a bottom (22), into which the fluid ports (15, 16, 17) open and in which the valve device (10) is installed. The valve device (10) is in frontal contact with the bottom (22) of the receiving space (20) at least in a sector (26). At least during operation, this sector (26) is sealed with respect to the receiving space (20) by at least one sealing device.