Plan 31 in Sealban

API Plan 31 is used to remove solids from the flush stream by incorporating a cyclone separator into the flush tubing. Flow is routed from the discharge side of the pump through the cyclone separator. Clean flush fluid leaving the separator is routed to the seal chamber while fluid containing the solids is routed back into the suction side of the pump. In order for Plan 31 to be effective, it is recommended that the specific gravity of the solids be at least twice the specific gravity of the flush fluid.

This plan:

Removes heat from the seal chamber

Ensures proper pressure in the seal chamber in order to prevent pumped fluid from vaporizing

Allows seal chamber to be self-venting when used with horizontal pumps

Removes solids from the flush fluid

Plan 31 is available as a kit of components ready for field assembly.