Plan 11 in Sealban

API Plan 11 recirculates flow from a high‐pressure section of the pump, typically the discharge piping, through a flow control orifice to the seal. Plan 11 is the default flush plan for most pumps.

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

Plan 11 is available as a kit of components ready for field assembly.