Seal chamber / Gland fit - Gland Boss must be perpendicular to the pump shaft http://www.mechanicalseals.net

1. PUMP CONDITIONPUMP CONDITION
EVALUATIONEVALUATION
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2. PUMP CONDITIONPUMP CONDITION
EVALUATIONEVALUATION
• BEARINGS
• PUMP SHAFT
• BEARING FRAME
• REAR COVER
• IMPELLER
• PUMP CASE

3. PUMP CONDITIONPUMP CONDITION
EVALUATIONEVALUATION
Vibration - Imperfections on rollers/balls
will cause seal face “chatter”
End Play - Closing force on the seal faces
will vary
Run Out
 Seal faces will not run in a concentric path
 Seal faces will not run parallel
 Vibration will occur
•BEARINGS

4. CHECKING BEARING RELATED END PLAYCHECKING BEARING RELATED END PLAY
Total Indicator Reading
should not exceed
.010”

5. CHECKING BEARING RELATED END PLAYCHECKING BEARING RELATED END PLAY
“TIR” should not exceed
.010”

6. CHECKING BEARING RELATED RUN OUTCHECKING BEARING RELATED RUN OUT
TIR should not exceed
.002”

7. CHECKING BEARING RELATED RUN OUTCHECKING BEARING RELATED RUN OUT
“TIR” should not exceed
.002”

8. PUMP CONDITIONPUMP CONDITION
EVALUATIONEVALUATION
Bent Shaft
 Run Out
 Vibration
Bearing Fits
Run Out
End Play
Shaft Sleeve Fit - Run Out
Impeller Thread/Fit - Vibration
•PUMP SHAFT

9. CHECKING SHAFT RELATED RUN OUTCHECKING SHAFT RELATED RUN OUT
“TIR” should not exceed
.001” per 2” distance
from bearing
6” = TIR max of .0036” = TIR max of .003

10. CHECKING SHAFT RELATED RUN OUTCHECKING SHAFT RELATED RUN OUT
TIR should not exceed
.001” per 2” distance
from bearing
3” = TIR .00153” = TIR .0015

11. PUMP CONDITIONPUMP CONDITION
EVALUATIONEVALUATION
Outboard Bearing Housing fit in
Frame
Bearing Fits
Run Out
Bearing Spin
Vibration
•BEARING FRAME

12. PUMP CONDITIONPUMP CONDITION
EVALUATIONEVALUATION
Seal chamber / Gland fit - Gland Boss must
be perpendicular to the pump shaft
Imperfections or wear on the impeller side
of the rear cover will effect the
performance of pump out vanes which in
turn, effects seal chamber conditions
Stuffing box pressure
fluid turbulence
•REAR COVER

13. CHECKING GLAND BOSS FORCHECKING GLAND BOSS FOR
PERPENDICULARITYPERPENDICULARITY
“TIR” should not exceed
.005” up to 5” Dia. (+.001"/in. >5”)

14. PUMP CONDITIONPUMP CONDITION
EVALUATIONEVALUATION
Excessive wear will effect pump
performance which will effect stuffing box
conditions
Impeller fit on shaft must be true
With open impeller pumps, proper impeller
/ case clearance is a must for optimum
pump performance and must be done
before installing a new seal
•IMPELLER & PUMP CASE

15. PUMP CONDITIONPUMP CONDITION
EVALUATIONEVALUATION
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