![]() ![]() In performance test the quality of top and bottom products are analyzed and compared with design criteria specifications. ![]() Glitsch states that the downcomer backup for valve trays should not exceed 40% of tray spacing for high vapor density. The covered areas in conjunction with the grouped orifices break the momentum of the liquid impacting upon the inlet area to reduce weeping. The downcomer includes a series of grouped discharge orifices disposed above either the perforated inlet or, in some cages, covered inlet areas which comprise momentum barriers. The region of the tray beneath an upper downcomer is constructed with a raised, perforated region for facilitating vapor passage therethrough and improving mass transfer efficiency. A downcomer tray assembly for vapor liquid contact towers.
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