Step Type Mechanically Cleaned Screens
The screen is made of two sets of step shaped lamella. One set is fixed and the other set made of every other lamella is movable. With a crank system mounted above water level, every other lamella makes a crank motion with respect to the fixed set of lamella, thus moving the debris one step up at each cycle. The debris falls into a chute after the uppermost step. Lamella plates are made of stainless steel whereas the supporting structure can either be stainless steel or hot dip galvanised steel. This type of screen can be used in deep channels with no problem and the slot width can be as low as 2 mm.
ARC TYPE SCREENS
The screen bars are in the form of an arc of a circle. In stead of bars a perforated plate can be used if small bar spacing is required. A rotating arm with replacable rakes scrapes the screen. With the help of a counter scraper the screenings are discharged on the chute.
