The smooth solid stream is also known as the so-called "primary jet". Low-pressure solid stream nozzlesbelong to this kind of nozzle.
Actually, the solid stream nozzle is not supposed to produce an atomized spray pattern, because it has been designed for maximum jet power. Here, the skill of Lechler design engineers was challenged to prevent concentrated, straight jets from disintegrating into drops at large distances.
Long, closed jet with puncti form impact pattern. Optimized flow conditions. Highest jet power. Concentrated solid stream jet.