These screens could be manufactured in variety of bar sizes as in coarse or fine range and can be used in industrial treatment plants as well as inlet structures and municipal wastewater treatment plants. Their simple design allows them to be used in shallow channels. They are self propelled and the multiple rakes operate continuously along the arc shaped bars to remove the scum and solid waste that deposit on the screen. The solid waste is separated from the water when the chains reach to the top reverses its position along the axis to dump the solid waste into a container. These screens can be manufactured from Aluminum, Epoxy coated or galvanized steel or stainless steel.