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Pump Equations and Formulas Calculator
Fluid Mechanics and Hydraulics
Solving For Brake Horsepower
Note: Equation for water at 68 Fahrenheit. Usually, temperature correction for water is negligible.
Inputs:
Conversions:
| Q | = | 0 | = | 0 | gallon/minute | |
| H | = | 0 | = | 0 | foot | |
| n | = | 0 | = | 0 |
Solution:
| brake horsepower (WHP) | = | HAS NOT BEEN CALCULATED |
Other Units:
Change Equation
Select an equation to solve for a different unknown
Water Horsepower
Net Positive Suction Head and Cavitation
Where
Select an equation to solve for a different unknown
Water Horsepower
 |
Solve for water horsepower |
 |
Solve for flow rate or discharge |
 |
Solve for total head |
 |
Solve for pump efficiency |
 |
Solve for brake horsepower |
Net Positive Suction Head and Cavitation
 |
Solve for NPSH - net positive suction head |
 |
Solve for fluid or liquid velocity |
 |
Solve for pressure at impeller inlet |
 |
Solve for fluid or liquid vapor pressure |
 |
Solve for specific weight of fluid or liquid |
 |
Solve for the acceleration of gravity |
Where
| WHP | = | water horsepower |
| Q | = | flow rate or discharge |
| H | = | total head |
| n | = | pump efficiency |
| BHP | = | brake horsepower |
| NPSH | = | net positive suction head |
| V | = | velocity of fluid or liquid |
| p | = | impeller inlet pressure |
| pv | = | vapor pressure of fluid or liquid |
| SW | = | specific weight of fluid or liquid |
| g | = | acceleration of gravity |
References - Books:
1) P. Aarne Vesilind, J. Jeffrey Peirce and Ruth F. Weiner. 1994. Environmental Engineering. Butterworth Heinemann. 3rd ed.
AJ Design - Online Science Mathematics Engineering Software Programs | 2 | 3 | 4 | 5
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