| 摘要 |
A fixed valve contact tray (26) for use in a mass transfer or heat exchange column and having a plurality of fixed valves (32) distributed across a tray deck of the contact tray. Each of the fixed valves (32) has a valve cover (50) that is wider than and extends outwardly beyond an underlying opening (46) in the tray deck, a perimeter region (56) of the valve cover that is beveled downwardly, and a boundary region (48) of the opening that is raised above a plane of the tray deck. |
