Industrial-process control valves - Flow capacity. Sizing equations for fluid flow under installed conditions
Industrial-process control valves - Flow capacity. Sizing equations for fluid flow under installed conditions
What is BS EN 60534-2-1 – Industrial process control valves flow capacity about?
BS EN 60534-2-1 is a part of IEC 60534 series that includes equations for predicting the flow of compressible and incompressible fluids through control valves. The equations for incompressible flow are based on standard hydrodynamic equations for Newtonian incompressible fluids. They are not intended for use when non-Newtonian fluids, fluid mixtures, slurries or liquid-solid conveyance systems are encountered. The equations for incompressible flow may be used with caution for non-vaporizing multi-component liquid mixtures. At very low ratios of pressure differential to absolute inlet pressure (Δ p / p1 ), compressible fluids behave similarly to incompressible fluids. Under such conditions, the sizing equations for compressible flow can be traced to the standard hydrodynamic equations for Newtonian incompressible fluids. However, increasing values of Δ p / p1 result in compressibility effects which require that the basic equations be modified by appropriate correction factors. The equations for compressible fluids are for use with ideal ga...
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