By means of the fan mounted on the roof of the booth, a negative pressure is created, the air flow moves from the extracting front to the exhaust plenum. The paint solids are removed as the airflow passes through a column of water falls in the booth.
Three stages of water along with physical stages of filtration removal and capture the paint pigments which are captured inside the collector tank. A submerged pump in the tank is used to pump the water back through a series of nozzles which, create the water barrier.
The pigments are initially removed by the front water curtain; subsequently, the residual part is forced to pass through other internal water curtains which removes most of the solid paint pigments. To ensure full solids removal, the air passes through a final dry stage of filtration. In the ZPG version, there are two additional water curtains set along the side walls of the booth to optimize the first filtering stage.