System Curve
m
m/(L/s)²
Pump Curve (H = aQ² + bQ + c)
m/(L/s)²
m/(L/s)
m
Fluid & Efficiency
-
%
L/s
NPSH Evaluation
m
m
m
NPSH Margin--
-20+2
Awaiting Input
Operating Point Results
Operating Flow (Qop)
--L/s
Operating Head (Hop)
--m
Pump Efficiency (η)
--%
Brake Horsepower
--kW
Required NPSH
--m
NPSH Margin
--m
Reference Formulas
System Curve:
Hsys = Hs + K · Q²
Pump Curve (Quadratic Fit):
Hpump = a · Q² + b · Q + c
Power & Efficiency:
Pw = SG · ρ · g · Q · H
BHP = Pw / η
NPSH Margin = NPSHa - NPSHr (HI recommends ≥ 1.5m / 5ft)
Pump & System Curve (H vs Q)
Power & Efficiency vs Flow
NPSH Available vs Required