Advantages & Disadvantages of Mechanical Seals

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 Advantages

  • Reduced Friction And Loss of Power

  • Negligible Product Leakage

  • Elimination Of Excessive Wear

  • Maintenance Reduced

  • Long Term Cost Effectiveness


Disadvantages

  • Less tolerant to shaft deflection and misalignment 

  • High beginning expense

  • The structure is relatively complex

  • Require workers to have a certain level of installation skills.

  • Less tolerant to dirty or contaminated liquid, Require expensive seal piping to flush and quench                        



Causes of the Pump Failures    

  • Mechanical seal failure - 60 to 70%
  • Bearings failure- 15 to 25%
  • Pumping rate 5 to 10%
  • Miscellaneous 5 to 15%

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