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Swagelok Allentown

Your Authorized Swagelok Sales and Service Center

Kit components shown solid and include some optional components.

API Plan 11 

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. 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 Swagelok Allentown for information on optional components.

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