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.
SIS SS IEC 534-2:1983 history
1983SIS SS IEC 534-2:1983 Industrial-process measurement and control — Industrial-process control valves — Sizing equations for incompressible fluid flow