ISA 75.02.01

This test standard utilizes the mathematical equations outlined in ANSI/ISA-75.01.01 (IEC 60534-2-1 Mod)-2007, Flow Equations for Sizing Control Valves, in providing a test procedure for obtaining the following:

a) Valve flow coefficient, C (C_v, K_v)

b) Liquid pressure recovery factors, F_L and FL_P

c) Reynolds Number factor, F_R

d) Liquid critical pressure ratio factor, F_F

e) Piping geometry factor, F_P

f) Pressure drop ratio factor, x_T and x_TP

g) Valve style modifier, F_d

This standard is intended for industrial process control valves used in flow control of Newtonian fluids. See 4.2 for more information regarding specific valve styles.

Purpose

The purpose of this standard is to support ANSI/ISA-75.01.01 (IEC 60534-2-1 Mod)-2007, Flow Equations for Sizing Control Valves, and ANSI/ISA-75.11.01-1985 (R2002), Inherent Flow Characteristic and Rangeability of Control Valves, by providing procedures for testing control valve capacity and related flow coefficients for both compressible and incompressible Newtonian fluids. This standard also provides a procedure to evaluate the major data to calculate the coefficients.