This simple looking device for small towers is actually a high performance distributor consisting of critically sized orifices, uniformly laid out on the base of the pan for proper liquid down flow, and adequate open area for upward flow of vapor.
This distributor can be made in both single and multi-piece construction. In multi-piece construction, all joints are gasketed. A re-distributor employs riser caps and when the attachment is to clips, a wall wiper is also required. Attachment to the tower wall is usually achieved by bolting to tower attachment clips. It can also be sandwiched between body flanges. Alternatively, it can be suspended from a ring, sandwiched between the body flanges.