Industrial-process control valves - Part 2-3: Flow capacity - Test procedures

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.