![]() P/P 1), compressible fluids behave similarly to incompressible fluids. (IEC 6 Mod) Control Valve Capacity Test Procedures (Please note that this ISA standard is an IEC adoption with modifications. ![]() This test standard utilizes the mathematical equations outlined in ANSI/ISA-75.01.01. ISA-75.01.01 › Industrial-Process Control Valves - Part 2-1: Flow Capacity - Sizing Equations for Fluid Flow Under Installed Conditions (6 Mod) More details PDF AVAILABLE FORMATS IMMEDIATE DOWNLOAD. At very low ratios of pressure differential to absolute inlet pressure (? ![]() Refer to Clause 6 for additional information. The equations for incompressible flow may be used with caution for non-vaporizing multi-component liquid mixtures. 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 are based on standard hydrodynamic equations for Newtonian incompressible fluids. This standard includes equations for predicting the flow of compressible and incompressible fluids through control valves.
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