Dual Mechanism Inclined Screens are the rugged machines that need for those heavy jobs. The dual 140mm mechanism is an alternative to the 160mm single shaft mechanism. This alternative extends bearing life on heavy-duty applications or increases speed on fine screen applications. The screens are available in both two and three deck models.
The dual media filter usually consists of a fine bed of sand under a coarser bed of anthracite coal. The coarse coal removes most of the influent solids, while the fine sand performs a polishing function. At the end of the backwash, the fine sand settles to the bottom because it is denser than the coal, the filter is ready for normal operation.