Abstract: A grid structure and screen device including the grid structure are provided for a vibrating shaker for filtering solids out of a moving fluid stream passing across this screen device. The grid structure has openings defined by intersecting lines of substantially continuous solid grid lines forming an angle. The angle formed at the intersection being from between less than 90.degree. and more than 0.degree., such that the grid structure fatigued resistance is enhanced while providing maximum open area therethrough.

Abstract: An industrial desilter apparatus includes a manifold having inflow and outflow conduits of invariant diameter, a plurality of cyclone separators in communication with the manifold, and one or more adaptor members for connecting the tubular inflow and/or outflow portions of a cyclone separator having any diameter with the corresponding inflow and/or outflow conduits of the manifold. A set of adaptors includes a first singularly-constructed, tubular member for connecting the inflow portion of said cyclone separator having any diameter to the inflow conduit of the manifold and a second singularly-constructed, tubular member for connecting an outflow portion of said cyclone separator having any diameter to the corresponding outflow conduit of the manifold.