IEC 60534-2-3:20 15(E)适用于工业过程控制阀，并提供了用于确定IEC 60534-2-1中给出的方程中使用的以下变量的流量测试程序: a)流量系数C； b)没有附接配件的液体压力恢复系数FL； c)具有附接配件FLP的控制阀的组合液体压力恢复系数和管道几何系数； d)管道几何系数FP； e)压差比因子xT和xTP； f)阀式调节器Fd； g)雷诺数因子FR。 第三版取消并取代了1997年出版的第二版，这是对第二版的技术修订。与上一版相比，此版本包括以下重大技术变更: a)增加资料性附件B、C、D、E和F。 b)对组织和格式进行了更改，以对技术上相关的主题进行分组。

IEC 60534-2-3:2015(E) 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 FL;
c) combined liquid pressure recovery factor and piping geometry factor of a control valve with attached fittings FLP;
d) piping geometry factor FP;
e) pressure differential ratio factors xT and xTP;
f) valve style modifier Fd;
g) Reynolds number factor FR.
This third edition cancels and replaces the second edition published in 1997, of which it constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) Addition of informative Annexes B, C, D, E and F.
b) Organizational and formatting changes were made to group technically related subject matter.