Pan Type Distributor/Redistributor

The pan type distributor is 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.

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. Mounting methods for the distributor will depend upon the location of other internals and in case of revamps, the type of attachments already present in the column.

A redistributor employs riser caps and when the attachment is to clips, a wall wiper is also required.

Selection criteria*:
• Column diameter between 150–900 mm (6–36 inches)
• Maximum turndown ratio 2:1
• Liquid rates > 5 m3/m2.hr (2.0 GPM/ft2)
• Low fouling

*Selection criteria guidelines provided are typical but not limiting. Under certain conditions, special design provisions can be made for accommodating varied hydraulic and mechanical requirements.