TP80-80/4 Shaft Seals Manual

Shaft seals
60
Failure analysis
Shaft seal failure analysis guide
The table below is intended as a general guide of typi-
cal seal failures.
On the following pages are examples of the most com-
mon causes of seal failures.
Component Result of visual examination
Possible causes of failure
Abrasion Poor lubrication Contamination Corrosion
Poor thermal control Incorrect installation System faults
Cooling Heating Assembly Fitting Misalignment Flow Pressure Temperature Poor venting Cleaning ( treatment) Vibration
Seal
Good condition 1 1 2
Noise 13 7 15 13 13 16
Seized 11 5
Clogged 17/18 19
Seal faces
Decomposed 18 11
Chipped 15 10 16
Etched 18 11 5
Flaked 13 10
Galled 13 6
Grooved 18 20 8 15 19 7 4
Incomplete track
Matted
Pitted
Scored/scuffed
Excessively worn 18 20 8 11 15 7 4 13 13 4 5
Discoloured 21 3
Deposits 9/17 22 15
Blistered 18 24 23 10
Fractured 3 10 4 3 16
Cracked 11 13 10 13 3 16
Elastomers
Chipped 10 25
Burnt 3 11 4 15 13 3
Swollen 11 13 11
Decomposed 28 12 3
Fractured 27 27
Extruded 19 10 13 13
Ruptured 10 27 28 27
Metal parts
Worn 26 28 13
Fractured 15 11 28 13 16
Discoloured 11 5
Etched 11 5
Pitted 11 5
Shaft/pipe
Worn 11 14/26 28
Ruptured 15 13
Cracked 15 13
Pitted 11 5