API Plan 11 Flush

Swagelok Alabama | Central & South Florida | West Tennessee Services Mechanical Seal Support Systems Process Side Plans (Kits & Assemblies) API Plan 11 Flush

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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.

API Plan 11
Kit components shown solid and include some optional components.

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. Kit contents may include:

Swagelok tube fittings
Flange adapters
Pipe fittings
V series 2-valve manifold
Bimetal thermometer
TTW series thermowell tee
PGI series gauges
Tubing
Pressure transmitter
Pipe nipple

See page 11 of the Mechanical Seal Support Systems Application Guide for additional details and ordering information. Contact us for information on optional components.