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API Plan 03

API Plan 03

Circulation between the seal chamber and the pump created by the design of the seal chamber. Flush connections plugged.

A  Taper bore design of seal chamber
B  Flush connection plugged


Seal chamber details

1  Flush (F), plugged (for possible future circulating fluid or for venting on vertical pumps)
2  Quench (Q)
3  Drain (D)
4  Seal chamber


Example seal: EagleBurgmann APItex-S single pusher mechanical seal.


P&ID according to API

Key

1  Flush (F), plugged (for possible future circulating fluid or for venting on vertical pumps).

 

Features

  • Does not need any external piping.
  • Cooling of the mechanical seal and venting of the seal chamber is a function of the geometry or flow enhancement features of the seal chamber.

 

 

Application

  • Pumps with taper bore seal chamber and without throat bushing.
  • Applications where mechanical seal heat generation is not very significant.
  • Applications where solids may tend to collect in a traditional cylindrical bore seal chamber.
  • Generally used for ANSI pumps – with Category 1 seals.

Remarks, checkpoints

  • Not to be used with cylindrical bore seal chambers.
  • Exercise caution for applications involving high seal chamber temperatures as well as pressures.

 

 

 

Pump media characteristics

  • Suspended solids
  • Low temperature and pressure

Location, function

  • Process side
  • Lubrication

Configurations

1CW-FL, 1CW-FX, 2CW-CW, 2CW-CS, 2NC-CS, 3CW-FB, 3CW-BB, 3CW-FF, 3NC-FB, 3NC-BB, 3NC-FF

 

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