Abstract: A burner capable of producing a low NOx emission combustion in the whole operating range, maintaining the flame at all times anchored to the diffuser body of the burner and without the use of systems, for example valves, with which to switch the introduction position of the reactants according to the temperature of the furnace. Such a burner is more flexible and cost-effective, both from a system point of view and from a control point of view, with respect to traditional burners.