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Mechanical Seals Troubleshooting-Coking (part 7) PDF Print E-mail
Written by Administrator   
Saturday, 20 September 2008 07:06

from Chesterton
Posted 2-23-04

 
     SEAL FACE - COKING                     SEAL 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

 
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