This section of IEC 60534 is intended for industrial-process control valves and outlines the procedures for testing flow capacity, which are essential for calculating the following parameters as specified in IEC 60534-2-1:
a) The flow coefficient, C;
b) The liquid pressure recovery factor without additional fittings, FL;
c) The combined liquid pressure recovery factor and piping geometry factor for a control valve equipped with fittings, FLP;
d) The piping geometry factor, FP;
e) The pressure differential ratio factors, xT and xTP;
f) The valve style modifier,Fd;
g) The Reynolds number factor, FR.
