Schuder, \"The Development of a Universal Gas Sizing Equation for Control Valves,\" ISA Transactions, Vol. Baumann, H.D., \"The Introduction of a Critical Flow Factor for Valve Sizing,\" ISA Transactions, Vol. ![]() 69 - ISA-75.01.01-2007 (IEC 6 Mod) Annex G (informative) - Bibliography INTERNATIONAL ELECTROTECHNICAL COMMISSION (IEC) IEC 60534-1 Part 1: Control Valve Terminology and General Considerations, 204-2-1 Part 2-1: Flow Capacity Sizing Equations for Fluid Flow Under Installed Conditions, 194-2-3 Part 2-3: Flow Capacity - Test Procedures, 1997 Available from: ANSI 25 West 43rd Street Fourth Floor New York, NY 10036 ISA Control Valve Capacity Test Procedures ANSI/ISA-75.02-1996 ANSI/ISA-75.05.01-2000 (R2005) Control Valve Terminology Baumann, H.D., \"Effect of Pipe Reducers on Control Valve Capacity,\" Instruments and Control Systems, December 1968. NOTE 2 Equation F.4 is applicable to fully developed laminar flow (straight lines in Figure 3b). NOTE 1 Select the lowest value from Equations F.3a and F.4. ![]() ![]() F.4 0.026 (not to exceed FR=1) FR = FL n 2Re v for the laminar flow regime.
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