Calculations
Recommendations
Specific pump velocityEstimated powerAvailable NPSH calculationCalculation of reservation volume of water supply systemDetermination of contact time - Ordinance GM/MS No. 888Estimation of the required NPSH, using the Thoma factor
Default
Input data
Flow
Manometric height
Pump's rotation
Output data
NPSH
Description
Given the values of flow, manometric head, and pump rotation, this calculation estimates the required NPSH (Net Positive Suction Head). In general, the obtained value is very conservative, ensuring the pump's safe operation.
Input and output parameters table:
| Parameter | Standard Units | Description |
|---|---|---|
| Flow () | L/s | Pump flow rate |
| Manometric height () | m | Pump's manometric head |
| Pump's rotation () | rpm | Pump's rotational speed |
| Required NPSH | m | Estimated required NPSH |
References
- VIANNA, Marcos R. Estações Elevatórias de Sistemas de Abastecimento de Água. E-book. Belo Horizonte, 2021.