Contaminants suspended at the center of the screen by the water’s continuous circular motion are expelled through a discharge valve during the backwash cycle. The initiation of this cycle depends on the filter’s configuration. In semi-automatic systems, the process is manual, where the operator monitors the pressure gauges at the inlet and outlet and, upon observing an increased pressure differential, manually opens the valve to discharge the accumulated contaminants

The operating principle of Hurricane Filters is based on cyclonic separation. As water enters the filter, it is guided by internal helix blades that induce a powerful circular motion, or vortex. This cyclonic action generates a centrifugal force that serves two purposes: it prevents contaminants from accumulating on the screen surface, thereby minimizing clogging, and it directs the suspended particles toward the center of the filter for collection.