In many applications, orifice deterioration and clogging are caused by solid dirt particles in the sprayed liquid. This is particularly common in systems using continuous spray water recirculation. In an average production process, recycling of water enables about 17 uses before discharge, as apposed to one or two uses without recirculation.
Self-cleaning nozzles feature a piston-type design. When line pressure is low, the piston retracts to purge debris from the nozzle orifice. Self-Cleaning nozzles are ideal for use in showers with high-solids content in the water and also inside paper machines because of the compact design.
Strainers, or nozzles with built-in strainers, trap larger particles and prevent debris from entering the nozzle orifice or vane to significantly reduce wear. A spiraling motion sweeps suction scanner nozzles across the screen to remove debris in self-cleaning strainers.