Nozzle for filling operations with two liquid and/or gas products for filler machines

A filling nozzle for filling operations with two liquid and/or gas products for filler machines which are alignable with a mouth of a container to be filled with two products, liquids and/or gases, said filler nozzle comprising a first fixed shutter element (21) and a first outlet opening (18) in a hollow body (16, 16a) is associated at the top with a first feeding system (12) for a first product to be dispensed into the container, the hollow body (16, 16a) being moveable in an upwardly direction by an actuator element (23) between an engagement position, in which the first opening (18) is closed by the first shutter element (21), and in a downwardly direction to a disengagement position, in which at least the first opening (18) is opened and the first product flows into the container, said first shutter element (21) being at least partially hollow (19) and being equipped on a first side with a second outlet opening (38), coaxial with said first opening (18) in said hollow body (16, 16a), and on a second opposite side with a second feeding system (11) for a second product to dispense into the container, inside and coaxial with said first hollow shutter element (21) is provided with a second shutter element (41) which is moveable by an actuator element (44) to an engagement position, in which it closes the second outlet opening (38), and a disengagement position in which the second outlet opening (38) is open and the second product flows into the container wherein the actuator elements (33, 44) are activated independently of one another for the movement of the hollow body (16, 16a) and of the second shutter (41) depending upon the type of container which is being filled.