from Chesterton
Posted 2/23/2004
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 |
