Gas-pressure regulator

1. A gas-pressure regulator, comprising:

an inlet, an outlet, a housing, a diaphragm, a control chamber and a discharge chamber,

wherein the inlet and the outlet each open onto the control chamber,

wherein the diaphragm partially delimits the control chamber,

wherein a passage between the control chamber and the discharge chamber is open in one position of the diaphragm,

wherein a movable limiting element is provided,

wherein the limiting element limits a movement of the diaphragm away from the control chamber so that the passage does not open,

wherein the limiting element is movable between an active and an inactive position, and

wherein the limiting element limits the movement of the diaphragm only in the active position.

2. The gas-pressure regulator according to claim 1 ,

wherein the gas-pressure regulator further has a control element,

wherein the diaphragm and the control element are configured and arranged within the housing such that the diaphragm and the control element are movable relative to each other,

wherein the passage between the control chamber and the discharge chamber is open in a relative discharge arrangement of the diaphragm and the control element.

3. The gas-pressure regulator according to claim 2 ,

wherein the limiting element is configured and arranged so as to be rotatable about the control element between the active and the inactive position,

wherein in the inactive position, the limiting element fits into a neck area of the housing when the diaphragm moves away from the control chamber, and

wherein in an active position, the limiting element abuts against the housing when the diaphragm moves away from the control chamber.

4. The gas-pressure regulator according to claim 2 ,

wherein the limiting element is configured and arranged so as to be radially displaceable with respect to the control element between the active and the inactive position,

wherein in the active position, the limiting element is located radially further inwards or outwards than in the inactive position,

wherein in the inactive position, the limiting element does not abut against a neck of the housing when the diaphragm moves away from the control chamber, and

wherein in an active position, the limiting element comes into contact with the housing when the diaphragm moves away from the control chamber.

5. The gas-pressure regulator according to claim 2 ,

wherein a lever and a sealing element are movably arranged within the housing,

wherein the sealing element is located between the inlet and the control chamber, and

wherein the lever is in mechanical contact with the control element.