Valve device in a motor vehicle

1. A valve device for a fuel cell arrangement in a motor vehicle, the valve device comprising:

a housing;

a flow channel extending in the housing;

a flap configured to influence a flow cross-section in the flow channel;

a shaft to which the flap is attached, the shaft being rotatably supported in the housing;

a drive configured to drive the flap via the shaft;

a valve seat arranged in the flow channel;

a seal comprising polytetrafluoroethylene (PTFE) arranged so as to extend on a radially peripheral edge of the flap, the seal being configured to contact the valve seat with the flap in a closed position of the flap, so that the shaft passes through the flap at an angle; and

a metal spring arranged radially peripherally with respect to the flap and attached to, or formed within, the seal, the metal spring comprising:

a plurality of spring tongues uniformly disposed at a periphery of the seal, and

an annular base body from which the spring tongues extend radially outwards,

wherein the annular base body of the metal spring and a radially inner-lying part of the seal are partly encapsulated by material of the flap.

2. The valve device as claimed in claim 1 , wherein the spring comprises between 10 and 30 spring tongues.

3. The valve device as claimed in claim 1 , wherein the seal and the metal spring are partly encapsulated by the material of the flap by injection molding.

4. The valve device as claimed in claim 1 , wherein the metal spring comprises at least one section forming an undercut filled with material of the flap.