Wedge Wire DSM Screen is also referred to stainless steel sieve bend screen, side hill screens, parabolic screens, run down screens, gravity screens. It is a curved concave wedge bar type of stationary screen. The common DSM screen available types are 45°, 60°, 120°, 270°, 300°.A curved screen has greater capacity than a flat screen due to forces exerted as material flows against the curved surface.