Flow control device for a single-control mixer cartridge particularly suitable for a bathtub unit

Device for the separate inflow of hot and cold water and for the outflow of hot, cold or mixed water in a single-control mixer cartridge particularly suitable for a bathtub unit, said bathtub unit comprising a cavity for accommodating said cartridge which is shaped like a well with a cylindrical side wall and a flat base and has, at its side wall, outlets of ducts for the inflow of hot and cold water respectively, said cavity being furthermore provided with at least one outflow opening for hot, cold or mixed water, comprising a disk which is provided with two holes for the inflow of hot and cold water respectively into the cartridge, and with a hole for the outflow of hot, cold or mixed water, and has two faces, the first face being substantially flat and arrangeable facing the cartridge, the second face being adjacently provided with a tunnel for connecting the outflow hole present in the disk to the at least one opening for the outflow of hot, cold or mixed water from the well, said tunnel forming two separate chambers together with portions of the side wall and of the base of the well;

• the well outlet of the hot water inflow duct and the hole for the inflow of hot water into the cartridge present in the disk are formed in the first chamber, and the well outlet of the cold water inflow duct and the hole for the inflow of cold water into the cartridge present in the disk are formed in the second chamber;
• a gasket comprising a circumferential part at the peripheral region of the disk and contacting the side wall of the well;
• portions extend monolithically from said circumferential part, and are inserted in seats formed on the walls of the tunnel and contact said side wall and the base of the well to delimit said two separate chambers;
• registration pins extend from said second face of the disk to fit in seats provided in the base of the well.