Tray tower internals are generally (but not always) removable items of tower hardware provided to achieve a process effect. These include not only trays, but also de-entrainment devices, impingement plates, baffles, pipes, internal sumps, etc.
Hanbit Soltech Corporation designs the attachments such as the tray support rings, the downcomer clamping (or bolting) bars, beam seats and beam clips that hold the trays.