|
Observed problem |
|
Problem source |
|
Corrective measure |
| 1. |
Reduced capacity of pump |
1a. |
Seal water temperature higher than design |
1a. |
Reduce temperature by increasing cooling water flow or check seal cooler for fouling |
|
|
1b. |
Low seal water flow rate |
1b. |
Adjust seal water flow rate or check centrifugal recirculation pump
|
| 2. |
Excessive noise |
2a. |
Excessive or insufficient seal liquid to pump |
2a. |
Adjust seal flow rate |
|
|
2b. |
Coupling misalignment |
2b. |
Realign coupling
|
| 3. |
High power consumption |
3. |
Excessive seal liquid |
3a. |
Adjust seal flow rate |
|
|
3b. |
Coupling misalignment |
3b. |
Realign coupling |
|
|
3c. |
Excessive discharge pressure |
3c. |
Correct as necessary |
|
|
3d. |
Defective bearing |
3d. |
Replace bearing |
|
|
3e. |
Gland ring too tight |
3e. |
Loosen gland ring |
|
|
3f. |
Improperly mounted pump
|
3f. |
Make sure mounting surface is level |
| 4. |
Overheating |
4a. |
Excessive seal liquid temperature |
4a. |
Check coolant flow rate and seal cooler fouling |
|
|
4b. |
Insufficient seal liquid flow rate |
4b. |
Increase seal liquid flow rate |
|
|
4c. |
Coupling misalignment |
4c. |
Realign coupling |
|
|
4d. |
Defective bearing |
4d. |
Replace bearing |
|
|
4e. |
Gland ring too tight |
4e. |
Loosen gland ring |
|
|
4f. |
Improperly mounted pump |
4f. |
Make sure mounting surface is level |
| 5. |
Vibration |
5a. |
Coupling misalignment |
5a. |
Realign coupling
|
|
|
5b. |
Pump or motor not properly anchored |
5b. |
Anchor pump or motor |
|
|
5c. |
Rotor imbalance |
5c. |
Balance rotor |
|
|
5d. |
Improperly mounted pump |
5d. |
Make sure mounting surface is level |
| 6. |
Mechanical seals "squeak" |
6. |
Insufficient lubrication |
6. |
Check flow of coolant to seals |
| 7. |
Pump shaft is seized and will not turn |
7a. |
Scale from hard water |
7a. |
Remove scale from pump |
|
|
7b. |
Foreign object in pump |
7b. |
Dismantle pump and remove object |
|
|
7c. |
Improperly mounted pump |
7c. |
Make sure mounting surface is level |
