Valve device

A valve device, comprising:

• a pressure regulator for a flowing gas and including a housing,
• the pressure regulator including a diaphragm, a spring, a control actuator, and a control seat,
• the housing and the diaphragm encompassing a flow-through chamber,
• the pressure regulator including a regulator cover which is connected to the housing,
• the regulator cover and the diaphragm encompassing a compensating chamber,
• the control actuator including a plate-like portion and a rod-like portion adjacent to one side of the plate-like portion,
• the control seat encompassing the rod-like portion of the control actuator,
• the diaphragm and the control actuator being mechanically coupled to each other such that an axial movement of the control actuator moves the diaphragm,
• the spring and the control actuator being mechanically coupled to each other in such a way that the spring urges the control actuator toward a face side of the control seat,
• the control seat limiting a movement of the control actuator,
• the control seat and the control actuator, in one state, preventing the gas from flowing,
• the control seat being configured as a ring arranged in a recess of the housing, and
• the control seat having at least one interruption in one face side so that two merlons are formed laterally of the interruption and so that a gas communication takes place between an interior of the control seat and the flow-through chamber even in the event that the control actuator rests on the face side, wherein:
• a free end of the rod-like portion of the control actuator is connected to a sealing element,
• in one position of the control actuator, the sealing element closes a lower face side of the control seat,
• a control gap is formed between the sealing element and the lower face side of the control seat, which is dependent on an axial position of the control actuator,
• the sealing element is shaped as a hemisphere,
• the sealing element includes a chamfer at a transition from a spherical portion to a planar portion of the hemisphere, wherein the planar portion of the hemisphere faces towards the lower face side of the control seat and the chamfer comes into contact with the lower face side of the control seat, and
• the control seat has a tapering inner contour.