DIN EN 60534-2-5:2004-03
Withdrawn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
01-02-2014
12-01-2013
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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