Gas pressure reducer with integrated shut-off valve

A device for regulating the pressure of a compressed gas, said device comprising:

• a body with a gas inlet, a gas outlet and a gas passage fluidly interconnecting the inlet and outlet;
• a mobile element biased by a main spring and carrying a shutter cooperating with a seat in the gas passage, the shutter and the seat forming a regulating valve, the element delimiting with the body a regulating chamber downstream of the valve and being configured to regulate the gas pressure in the chamber by varying a flow section in the valve dependent on the pressure;
• a shut-off valve with a shutter and a seat in the gas passage upstream of the regulating valve;
• an actuation assembly of the shut-off valve;
• wherein the shutter of the shut-off valve comprises a stem extending through the shutter of the mobile element and at least partly through the mobile element, for cooperating with the actuation assembly.