Servo gas valve

A servo gas valve for a gas control device, comprising:

• a gas inlet connection;
• a servo gas connection;
• a bleed gas connection;
• a valve body;
• first and second valve seats acting together with the valve body in such a way that in a first position of the valve body, when a first section of the valve body is pressed against the first valve seat, the gas inlet connection is closed and the servo gas connection and the bleed gas connection are in communication with each other, while in a second position of the valve body, when a second section of the valve body is pressed against the second valve seat, the gas inlet connection is opened and is in communication with the servo gas connection while the bleed gas connection and the servo gas connection are not in communication with each other;
• and
• a valve stem carrying the valve body, wherein the valve stem is moveable in a linear direction to allow a movement of the valve body relative to the first and second valve seats,
• wherein the valve stem includes a valve plunger, the valve plunger acting together with an actuator in such a way that when the actuator is activated or energized, the valve stem that includes the valve plunger presses the second section of the valve body against the second valve seat, while when the actuator is deactivated or not energized, the valve stem that includes the valve plunger presses the first section of the valve body against the first valve seat,
• wherein the valve stem further includes a bulge section defining a recess that defines a hollow space between the valve stem and the first section of the valve body,
• wherein the first section of the valve body is configured to deform into the hollow space when the first section of the valve body is pressed against the first valve seat to allow a self-alignment of the first section of the valve body relative to the first valve seat, and
• wherein the valve body is provided by a hat shaped element having an inner cap shaped section and an outer brim shaped section, wherein the first section of the valve body acting together with the first valve seat is provided by the inner cap shaped section, and wherein the second section of the valve body acting together with the second valve seat is provided by the outer brim shaped section.