A system including a vibratory separator includes at least one screen and a pressure differential system. The pressure differential system includes a pressure differential generating device, a tray coupled to the pressure differential generating device, and an adjustable mounting mechanism configured to couple the tray within the vibratory separator and adjust a distance between the tray and the at least one screen of the vibratory separator.

A system including a vibratory separator includes at least one screen and a pressure differential system. The pressure differential system includes a pressure differential generating device, a tray coupled to the pressure differential generating device, and an adjustable mounting mechanism configured to couple the tray within the vibratory separator and adjust a distance between the tray and the at least one screen of the vibratory separat- or.

A vibrating screen is provided for separating excess water from particulate materials such as sand, gravel, iron ore, sludge or other particulate material and/or for grading, classifying or sorting particulate material by size. The vibrating screen includes a frame upon which is mounted a deck having a plurality of apertures therein, the frame being mounted on a base and being provided with vibration generating means for imparting vibration to the deck, wherein the frame includes pair of substantially parallel side walls between which the screen is mounted, each side wall including a pair of spaced apart side members defining outer faces of the side wall, at least one intermediate member being located between the side members, wherein the at least one intermediate member incorporates a plurality of apertures and/or cut-outs therethrough.

A system for mechanical separation of materials comprising at least two platforms, each comprising screws undergoing a rotational movement, wherein the screws have a proximal end and a distal end, the distal end being free, wherein the screws of a first one of the at least two platforms all have a first inclination from the proximal end thereof to the distal end thereof; wherein the screws of a second one of the at least two platforms all have a second inclination from the proximal end thereof to the distal end thereof; the first inclination being different from the second inclination. The at least two platforms form a drop in-between along the main direction of travel. There is a double-start thread screw by the drop on the downstream platform that prevents long objects to pass through the screws and optionally a curtain of elongated members by the drop.