A nozzle having intersecting perpendicular inlet and outlet axes is constructed with a cylindrical whirl chamber into which liquid is introduced from a transition passage. The latter is bounded by a flat surface of substantial width, with one end of the flat surface being tangent to the cylindrical surface defining the whirl chamber. In cross-section perpendicular to the flat surface and to the direction of liquid flow in the transition passage the latter is bounded by a straight flat section and a tapered down section connected to the ends of the flat section. This construction substantially reduces turbulence in the whirl chamber resulting in better controlled conical spray output for the nozzle.
