Booster Pump to Roof Tank
A ground-level break tank feeds a curve-mode booster pump lifting water 25 m to a roof storage tank. The solver finds the operating point where the pump curve crosses the system’s static-plus-friction demand — just under 13 L/s at about 24 m of head on this network, comfortably inside the supplied curve points.
The suction side is deliberately generous (DN125, about 1 m/s) so the pump sees a healthy 12 m of NPSH available against its 3 m requirement — the suction check the solver reports on every liquid pump. A swing check valve on the discharge blocks reverse flow when the pump stops; run the model with the pump curve zeroed and the solver closes it for you.
Solved results — Incompressible solver, 4 iterations
| Delivered flow | 12.9L/s |
| Pump head at duty point | 24.1m |
| NPSH available | 12.14m |
| Suction velocity | 0.9998m/s |
| Riser velocity | 1.571m/s |
What this example shows
- Pump curve operating point solved, not assumed
- NPSH available reported against the pump's NPSHr
- Swing check valve with real closure behaviour
Explore it yourself
Open the solved model in the browser sandbox — no account needed — or create a project from this template to modify and re-run it.