# Available NPSH screening
# Scope: Open suction reservoir NPSH available; absolute pressures and supplied suction losses.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

atmosphere = 101.3 kPa
vapor = 2.3 kPa
staticHeight = 1 m
lossHead = 0.5 m
density = 1000 kg/m^3
gravity = 9.81 m/s^2
required = 3 m

available := (atmosphere-vapor)/(density*gravity)+staticHeight-lossHead [m]
margin := available-required [m]

check NPSH margin target: margin >= 1 m

scenario alternative: atmosphere = 81.04 kPa