11.System head too high.
12.NPSHA too low – excessive suction lift or losses.
13.Discharge head too low – excessive flow rate.
14.Fluid viscosity, specific gravity too high.
15.Worn bearing.
16.Pump, motor or piping loose.
TORQUE VALUES
| HP | Motor | Motor Bolt | Adapter Flange |
| Coupling | |
|
| Frame |
|
|
|
| |
| ¾ | 56C | 20 lbs ft (27 N .m) | – | 15 lbs ft (20 N .m) |
| |
| 1 | 56C | 20 lbs ft (27 N .m) | – | 15 lbs ft (20 N .m) |
| |
| 1½ | 56C | 20 lbs ft (27 N .m) | – | 15 lbs ft (20 N .m) |
| |
| 2 | 56C | 20 lbs ft (27 N .m) | – | 15 lbs ft (20 N .m) |
| |
| 3 | 56C | 20 lbs ft (27 N .m) | – | 15 lbs ft (20 N .m) |
| |
| 5 | 184TC | 20 lbs ft (27 N .m) | – | 15 lbs ft (20 N .m) | 37 lbs ft (50 N .m) | |
|
|
|
|
|
|
|
|
| 7½ | 184TC | 20 lbs ft (27 N .m) | – | 15 lbs ft (20 N .m) | 37 lbs ft (50 N .m) | |
|
|
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|
|
|
|
|
| 10 | 213TC | 45 lbs ft (61 N .m) | 30 lbs ft (40 N .m) | 30 lbs ft (40 N .m) | 48 lbs ft (65 N .m) | |
| 215TC | ||||||
|
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| |
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|
|
| 15 | 215TC | 45 lbs ft (61 N .m) | 30 lbs ft (40 N .m) | 30 lbs ft (40 N .m) | 48 lbs ft (65 N .m) | |
| 254 TC | 48 lbs ft (65 N .m) | 48 lbs ft (65 N .m) | ||||
|
|
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|
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|
|
| 20 | 254TC | 45 lbs ft (61 N .m) | 48 lbs ft (65 N .m) | 48 lbs ft (65 N .m) | 48 lbs ft (65 N .m) | |
| 256TC | ||||||
|
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|
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|
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| |
|
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|
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|
|
| 25 | 256TC | 45 lbs ft (61 N .m) | 48 lbs ft (65 N .m) | 48 lbs ft (65 N .m) | 48 lbs ft (65 N .m) | |
| 284TC | ||||||
|
|
|
|
|
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| |
|
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|
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|
|
|
| 30 | 284TC | 45 lbs ft (61 N .m) | 48 lbs ft (65 N .m) | 48 lbs ft (65 N .m) | 48 lbs ft (65 N .m) | |
| 286TC | ||||||
|
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| |
|
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|
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|
|
| 40 | 284TC | 45 lbs ft (61 N .m) | 48 lbs ft (65 N .m) |
|
| 48 lbs ft (65 N .m) |
| 286TC |
|
| ||||
|
|
|
|
|
|
| |
| 50 | 324TSC | 45 lbs ft (61 N .m) | 48 lbs ft (65 N .m) |
|
| 48 lbs ft (65 N .m) |
| 326TSC |
|
| ||||
|
|
|
|
|
|
| |
| 60 | 326TSC | 45 lbs ft (61 N .m) | 48 lbs ft (65 N .m) |
|
| 48 lbs ft (65 N .m) |
| 364TSC |
|
| ||||
|
|
|
|
|
|
| |
| 75 | 365TSC | 45 lbs ft (61 N .m) | 48 lbs ft (65 N .m) |
|
| 48 lbs ft (65 N .m) |
|
|
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|
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TORQUE VALUES
Pump Size | Tie Rod Nuts | Vent and Drain | |
1SV | 22 lbs ft (30 N .m) | 15 lbs ft (20 N .m) | |
|
|
| |
2SV | 22 lbs ft (30 N .m) | 15 lbs ft (20 N .m) | |
|
|
| |
3SV | 37 lbs ft (50 N .m) | 15 lbs ft (20 N .m) | |
|
|
| |
4SV | 37 lbs ft (50 N .m) | 15 lbs ft (20 N .m) | |
|
|
| |
33, 46, | 44 lbs ft (60 N .m) | 29 lbs ft (40 N .m) | |
66, 92SV | |||
|
| ||
|
|
|
NOTE: Discharge loop must be high enough to keep liquid in the bottom stages during
14
