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Troubleshooting

Secondary hang-up

9 Change to non-fretting mechanical seal
Incorrect installation
9 Skills training needed
9 Change to cartridge seal design
Crystallization

9 Improve environmental controls
Flashing at seal faces
9 Improve environmental controls
9 Check pump operation for higher temperature

High percentage of solids
9 Improve environmental controls
9 Change to large bore seal chamber
9 Check for change in pumpage
Repetitive~cyclical failure

9 Check for low flow. (See Figure 11.1)
9 Increase the shaft strength. (See 11.4.2.2)
9 Improve environmental controls.
9 Check inlet piping layout (See 11.4.2.1 and 9.2)

9 Eliminate pipe strain
9 Improve shaft alignment
Vibration problems
9 See Figures 11.2 and 11.3
Excessive shaft end play
9 See Bearings, Chapter 11.5.5

11.5.7.1 Mechanical seal - seal faces
Widened wear track
9 See Bearings, Chapter 11.5.5
9 Correct angularity of stationary face
9 Increase the shaft strength. (See 11.4.2.2)

9 Eliminate pipe strain

197 m