Troubleshooting Mechanical Seals – Coking – Part 7

Troubleshooting Mechanical Seals – Coking – Part 7

Chesterton

mechanical seals, seal face - coking, seal face - crystallized
SEAL FACE – COKINGSEAL FACE – CRYSTALLIZED
SYMPTOMS:
  • Coking or crystallized product
CAUSES:
  • Excessive temperatures (both)
  • Dirty or contaminated fluid (coking)
  • Operating outside of the temperature envelope of the fluid (both)
  • Small clearances in the seal chamber
  • Pump cooling jacket not efficient
  • Fluid evaporation between the seal faces (crystallization)
FAILURE MODES:
  • Inadequate environmental controls
  • Product harden, set-up or coked
  • Exceeded limits (speed, temperature, pressure)
SOLUTIONS:
  • Proper use of environmental controls
  • Operate within seal limits
  • Understand the temperature envelope of the fluid being sealed

Chesterton

This is a 9 part series. Click to view each article: 1 : 2 : 3 : 4 : 5 : 6 : 7 : 8 : 9 

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