EN 60534-2-5:2003
Withdrawn
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Industrial-process control valves - Part 2-5: Flow capacity - Sizing equations for fluid flow through multistage control valves with interstage recovery
01-10-2006
14-10-2003
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Installation
5 Symbols
6 Sizing equations for incompressible fluids
6.1 Turbulent flow
7 Sizing equations for compressible fluids
7.1 Turbulent flow
8 Determination of correction factors
8.1 Piping geometry factor, F[p]
8.2 Liquid pressure recovery factors F[L] or F[LP]
8.3 Liquid critical pressure ratio factor F[F]
8.4 Expansion factor Y
8.5 Pressure differential ratio factor x[T] or x[TP]
8.6 Specific heat ratio factor F[gamma]
8.7 Compressibility factor Z
8.8 Stage interaction factor k
8.9 Reheat factor r
Annex A (informative) Physical constants [a]
Annex B (informative) Examples of sizing calculations
Annex ZA (normative) Normative references to international
publications with their corresponding European
publications
Bibliography
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