The equations presented in this section of the standard are based on the Bernoulli equation for Newtonian incompressible fluids. They are not intended for use when non-Newtonian fluids@ fluid mixtures@ slurries@ or liquid-solid conveyance systems are encountered.
IEC 60534-2:1978 history
1978IEC 60534-2:1978 Industrial-process control valves. Part 2: Section one - Sizing equations for incompressible fluid flow under installed conditions