Pressure limiting device with two pressure levels for a pressure cooker

A device for limiting the pressure to at least two pressure levels for a steam pressure-cooker, the said device comprising a steam escape duct terminating externally in a valve seat surrounding the duct opening, a cap which has an axial cavity adapted to accommodate the escape duct and connected to the outside by two substantially tangential vents, wherein the cap is adapted to slide upon the steam escape duct and may be at will turned over with respect to the steam escape duct, and a valve slidable in the axial cavity and provided at its ends with coaxial differently designed shut-off surfaces adapted to bear upon the seat in order to shut off the duct with different shut-off cross sections, the cap comprising, at each end, stops designed to apply the weight of the cap to the shut-off surface in such a manner that the center of gravity of the cap is located below the contact between the shut-off surface and the seat thereof.