Dual gas pressure regulator for a household appliance

A gas pressure regulator valve adapted to a household appliance for the supply of a gas flow of any type of gas, natural NG or liquified LPG, comprising:

• a valve body with an inlet gas conduit from a NG or a LPG source at a variable pressure Pi, an outlet gas conduit of NG or LPG gas supplied at a respective nominal adjusted pressure Pn or Pl of said two types of gas, and a peripheral assembly surface;
• a pressurised gas chamber connecting both the inlet and outlet conduit through a regulation valve whose passage hole is adjustable,
• a division diaphragm connected to the valve member and assembled securely on the valve body, through a flexible seal;
• a rotatable closure cap assembled on the valve body and defining an air chamber above the diaphragm at the atmospheric pressure;
• adjusting means of said nominal pressure value Pn or Pl of the gas acting on the diaphragm and the valve member to effect on the latter a prefixed adjusting displacement,
• said adjusting means comprising an adjusting screw threaded in the closure cap, at least one adjusting spring, prestressed and acting on the diaphragm to keep said pressure Pn or Pl in the gas chamber constant, a rotation guide in the closure cap and a rotation stopper in the valve body engageable with the rotation guide, and the closure cap provided with a retainer that retains the closure cap on the valve body, in the axial direction of the closure cap and of the valve body, permitting a degree of freedom for the rotation of the closure cap in relation to the valve body between two angular positions, an arc (A) being spaced between them, and
• wherein said adjusting means on the closure cap determines in conjunction with a feature on the diaphragm two displacements of the valve member different to each other, for the adjusting of said respective nominal pressures Pn and Pl.