SN EN 60534-2-5 : 2003
Current
The latest, up-to-date edition.
INDUSTRIAL-PROCESS CONTROL VALVES - PART 2-5: FLOW CAPACITY - SIZING EQUATIONS FOR FLUID FLOW THROUGH MULTISTAGE CONTROL VALVES WITH INTERSTAGE RECOVERY
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
Provides equations for predicting the flow of compressible and incompressible fluids through multistage control valves.
| DocumentType |
Standard
|
| PublisherName |
Swiss Standards
|
| Status |
Current
|
| Standards | Relationship |
| DIN EN 60534-2-5:2004-03 | Identical |
| I.S. EN 60534-2-5:2003 | Identical |
| EN 60534-2-5:2003 | Identical |
| IEC 60534-2-5:2003 | Identical |
| BS EN 60534-2-5:2003 | Identical |
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