Abstract: An atomizing nozzle usable on a vaporizer or atomizer is provided, having a unified core and valve member and a diaphragm perforated by a narrow orifice. The unitary member is axially mobile and laterally guided in a chamber within the nozzle. Additionally, the unified member has, on its end remote from the orifice, a concave circular cup in which the edges of the cup are turned toward the orifice, and, on its end nearest to the orifice, a core portion which cooperates with the diaphragm to form a system of turbulent channels which supply the orifice.