Specific Speed Ns
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Formula, assumptions, and limits
| Symbol | Meaning | Unit |
|---|---|---|
| rpm | rpm | |
| Flow at BEP | m³/s | |
| Head at BEP | m |
Source: Hydraulic Institute ANSI/HI 9.1-9.5
In short
Dimensionless ratio that characterises pump type.
| Symbol | Meaning | Unit |
|---|---|---|
| rpm | rpm | |
| Flow at BEP | m³/s | |
| Head at BEP | m |
Source: Hydraulic Institute ANSI/HI 9.1-9.5
Dimensionless ratio that characterises pump type.