IEC 60534-2-3:2015

IEC 60534-2-3:2015 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:<br /> a) flow coefficient C;<br /> b) liquid pressure recovery factor without attached fittings FL;<br /> c) combined liquid pressure recovery factor and piping geometry factor of a control valve with attached fittings FLP;<br /> d) piping geometry factor FP;<br /> e) pressure differential ratio factors xT and xTP;<br /> f) valve style modifier Fd;<br /> g) Reynolds number factor FR.<br /> 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:<br /> a) Addition of informative Annexes B, C, D, E and F.<br /> b) Organizational and formatting changes were made to group technically related subject matter.