KSB Centrifugal Pump Lexicon –

From A to Z

Barrier fluid

The barrier fluid (see Barrier fluid system) required to operate a double mechanical seal (see Shaft seal) is often hydraulic oil or water.

Requirements

  • Compatibility with the fluid or medium to be sealed
  • Excellent lubricating qualities
  • High specific heat capacity
  • Environmental friendliness

To dissipate friction heat it is important that the barrier fluid circulates.

  

  

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