EN 60534-2-3:2016

FOREWORD
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Test system
6 Accuracy of tests
7 Test fluids
8 Test procedure for incompressible fluids
9 Data evaluation procedure for incompressible fluids
10 Test procedure for compressible fluids
11 Data evaluation procedure for compressible fluids
Annex A (normative) - Typical examples of test specimens
        showing appropriate pressure tap locations
Annex B (informative) - Engineering data
Annex C (informative) - Derivation of the valve style
        modifier, F[d]
Annex D (informative) - Laminar flow test discussion
Annex E (informative) - Long form FL test procedure
Annex F (informative) - Calculation of FP to help
        determine if pipe/valve port diameters
        are adequately matched
Bibliography
Annex ZA (normative) - Normative references to
         international publications with their
         corresponding European publications

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.