| Step 1:
Process Data Inputs |
| 1.1 |
Fluid (eg butane) |
| 1.2 |
Pumping Temperature (F) |
| 1.3 |
Barometric Pressure, in psia |
| 1.4 |
Pressure on the surface of the liquid in a closed suction tank, in psig
(Use zero (0) psig for sumps and ATMS. tanks ) |
| 1.5 |
Vapor Pressure at the maximum pumping temperature, in psia |
| 1.6 |
Fluid's Specific Gravity |
| 1.7 |
Elevation head in feet (Use positive value for flooded suction, use negative value for lifting suction) |
| 1.8 |
Friction loss in feet in the suction pipe at the required capacity |
| 1.9 |
Required NPSH margin in feet |
| Step 2:
Solve |
| 2.1 |
Proof steps |
| 2.2 |
Solve for the NPSHa centrifugal pump |