Valve device with at least two separately produced valves assembled together for joint movement

A valve device comprising:

• a housing surrounding a flow duct portion;
• and
• at least two valves accommodated on the housing and movable relative thereto such that adjustment of the valves relative to the housing modifies the effective flow area of the flow duct portion;
• wherein adjacent valves of the at least two valves are produced separately and are couplable or coupled together for joint movement by interlocking geometries;
• wherein at least one of the at least two valves comprises:
• at least one valve shaft portion, with which the valve is rotatably supported on the housing;
• and
• a valve body, which is accommodated in the flow duct portion so as to modify the flow area;
• and
• wherein the at least one valve shaft portion is constructed in one piece with the valve body.