Low
Capacity |
| Possible
Causes | |
What To Do
| |
|
Pump speed too slow | |
Use tachometer to determine pump speed. Adjust speed. |
|
|
Low voltage | |
Check motor speed. |
|
|
Differential pressure too high | |
Restriction in discharge piping or discharge piping is too small. |
|
|
Clearance between impeller and stage casing too wide due to wear | |
Replace casing and impeller. |
|
|
Clogged strainer | |
Clean strainer. |
|
|
Suction pipe too small or restricted | |
Indicated by pump inlet pressure dropping several pounds when pump is started.
Remove restriction or modify piping. |
|
|
Leaks in connections allowing air into pump | |
Check connections. |
|
|
Product contains over 50% vapor | |
Review product and inlet piping for excessive pressure drop. |
|
|
NPSH available does not meet required | |
Review NPSH. |
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