Pump - NPSH Required (NPSHr)
Pump NPSH required estimation from impeller geometry and operating point - the value that NPSHa must exceed for reliable operation.
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Formula, assumptions, and limits
| Symbol | Meaning | Unit |
|---|---|---|
| Pump speed | rpm | |
| Flow | gpm | |
| Suction specific speed |
Source: API 610 / ISO 13709
In short
Pump NPSH required estimation from impeller geometry and operating point - the value that NPSHa must exceed for reliable operation.