Flat Fan spray nozzles produce a fan-shaped pattern, that is mainly produced by two methods; an angled cut or groove, with which the water is hydraulically driven to produce the flat pattern, or via a sloping deflection face with uses the slope to drive the spray pattern.
These nozzles produce a thin, flat sheet of liquid that expands outward from the nozzle typically in a ‘V-shaped’ pattern. A thin line of liquid is produced when the spray intersects a surface. As the liquid is concentrated into a smaller area, the impact force from fan nozzles can be greater than that produced from a full or hollow cone nozzle.