A gas-pressure regulator

A gas-pressure regulator, comprising:

• an inlet, an outlet, a housing, a diaphragm, a control element, a control chamber, a discharge chamber, an adjustable biasing element and a spring component,
• wherein the inlet and the outlet each open onto the control chamber,
• wherein the diaphragm partially delimits the control chamber,
• 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 a passage between the control chamber and the discharge chamber is open in a relative discharge arrangement of the diaphragm and the control element,
• wherein an adjustable biasing element impedes a relative movement between the diaphragm and the control element,
• wherein the relative movement between the diaphragm and the control element takes place against a spring force of the spring component),
• wherein the biasing element acts on the spring force,
• wherein the biasing element is configured and arranged so as to be movable relative to the control element,
• wherein a closing force of the spring component depends on a position of the biasing element relative to the control element,
• wherein the adjustable element can assume one of two fixed positions and is movable between the two fixed positions,
• wherein the biasing element prevents the discharge arrangement from being reached, and
• wherein either an eccentric component is provided, which causes an axial movement of the biasing element along the control element, or in inactive state, a protrusion of the control element rests in a recess of the plate-like biasing element and, by a rotation of the biasing element about a longitudinal axis of the control element, the protrusion is located outside the recess so that the biasing element assumes a deeper axial position in the direction of the diaphragm.