This is the screen type used as both thin and thick screen at large and medium size treatment plants. Without any limitation of channel height, they can operate even in very deep channels. Linear mechanical grid is a mechanical equipment which rakes and cleans vertically the bar grid mounted at 75° angle to screen channel base. In general it consists of chassis, fixed screen, peeling system and dustbin. All movements of peeler palette are automatically controlled. Peeling movement starts from the lower dead point and ends when the counter peeler at higher point transfers the wastes accumulated in rake to accumulating container. During down flow, rake changes its position and removes itself from the screen. When flat mechanic grit is stopped, rake parts at the highest position and does not prevent water flow. Level can work in and adjusted or time adjusted manner.