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The Practical Pumping Handbook .................... ~ ". ..... -__ - ~ -

Zero wear track
9 Improve seal installation to contact faces
9 Change to large bore seal chamber
Severe uniform wear
9 See Bearings, Chapter 11.5.5

9 Check for excessive Pressure-Velocity value
9 Improve environmental controls
Intermittent wear pattern
9 Change to flexible mounted stationary face

9 Ensure faces are flat when installed
9 Installation training needed
Edge chipping
9 Check pump operation for vaporization
9 Improve environmental controls
9 Increase the shaft strength. (See 11.4.2.2)

Heating checking
9 Check for pumpage for excessive temperatures
9 Check for excessive Pressure-Velocity value
9 Check for dry running of pump

9 Upgrade the material selection
9 Improve environmental controls
Coking or Crystallization
9 Check for pumpage for excessive temperatures
9 Change to large bore seal chamber

9 Improve environmental controls
9 Upgrade the material selection
Blistering
9 Upgrade the material selection
Corrosion

9 Upgrade the material selection

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