This part of IEC 60534 is applicable to industrial-process control valves and provides the flow capacity test procedures for determining the following variables used in the equations given in IEC 60534-2-1:
a) flow coefficient C;
b) liquid pressure recovery factor without attached fittings F L ;
c) combined liquid pressure recovery factor and piping geometry factor of a control valve with attached fittings F LP ;
d) piping geometry factor F P ;
e) pressure differential ratio factors x T and x TP ;
f) valve style modifier F d ;
g) Reynolds number factor F R
