The brush cleaning system is mostly used in the first stage of filtration, where roughing pre-treatments is needed.
When the differential pressure gauge reaches the pre-set pressure difference between filter inflow and outflow, a signal is triggered and the cleaning starts. The first phase rebalances the inflow and outflow pressures by closing the flow valve (1). Afterwards, the brushes (2) inside the filtering element (3) start rotating operated via an electric motor (4) and they remove the dirt built-up, discharging it through the valve (5). The filter operates at very low pressure of 0.5 bar with low consumption of water during the washing phase. Average length of the cleaning cycle is 20 sec.