Troubleshooting Mechanical Seals – Scoring – Part 5

from Chesterton
Posted 11/10/2003

320-1 

 

SEAL FACE SCORING SEAL FACE EROSION

SYMPTOMS:

  • Scoring or erosion

CAUSES:

  • Rebuilding seal in dirty environment
  • Faces opening/flashing/vibration/distortion of the seal face due to temperature and pressure
  • Minerals found in the fluid film between the seal faces

FAILURE MODES:

  • Abrasive particles between the seal faces
  • Lack of seal face lubrication

SOLUTIONS:

  • Maintain seal face flatness
  • Eliminate dry running, flashing and vibration
  • Use clean flush source with bushing
  • Use suction recirculation control
  • Use harder seal face materials
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