Troubleshooting Mechanical Seals – Scoring – Part 5

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