Abstract: A valve accommodated in a separation tray including upper (3) and lower (5) trays, a lock (1) formed between the upper (3) and lower (5) trays. The valve (13) includes a closing element (11) configured such that an orifice (9) in the lower tray (5) is closed by the closing element (11) in a first valve position so that liquid flows from the upper tray (3) into the lock (1), and, in a second valve position, the orifice (9) and an orifice (7) in the upper tray (3) are opened so that gas flows through the lock (1) and liquid on the upper tray (3). The closing element (11) is in the form of a hood including a jacket (23) having orifices (21) positioned in such a way that, in the second valve position, gas flows through the orifices (21) into the liquid on the upper tray (3).