It is one mainly parts of Plate tower,which was constructed by Tower Plate, downcomer and overflow weir, fasteners and supporting parts. When gas is rising from down to top, liquid flows down. In order to enlarge gas & liquid contacting area and increase mass transfer’s efficiency, Tower tray’s function is let gas & liquid’s fully contacting so as to ensure liquid’s maximum efficiency absorption.If the tower diameter is less than 800 mm,the tower tray is whole piece. Otherwise, it will be devide into many pieces.