BS EN 60534-2-5:2003
Current
The latest, up-to-date edition.
Industrial-process control valves. Flow capacity Sizing equations for fluid flow through multistage control valves with interstage recovery
Hardcopy , PDF
English
07-11-2003
Important note : Users cannot be edited or removed once added to your Multi user PDF.| Committee |
GEL/65/2
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| DevelopmentNote |
Supersedes 00/242922 DC. (11/2003)
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| DocumentType |
Standard
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| Pages |
32
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| PublisherName |
British Standards Institution
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| Status |
Current
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| Supersedes |
This part of IEC 60534 includes equations for predicting the flow of compressible and incompressible fluids through multistage control valves.
The equations for incompressible flow are based on standard hydrodynamic equations for Newtonian incompressible fluids. They are not intended for use when non-Newtonian fluids, fluid mixtures, slurries, or liquid-solid conveyance systems are encountered.
At very low ratios of pressure differential to absolute inlet pressure (Δp/p1), compressible fluids behave similarly to incompressible fluids. Under such conditions, the sizing equations for compressible flow can be traced to the standard hydrodynamic equations for Newtonian incompressible fluids. However, increasing values of Δp/p1 result in compressibility effects which require that the basic equations be modified by appropriate correction factors. The equations for compressible fluids are for use with gas or vapour and are not intended for use with multiphase streams such as gas-liquid, vapour-liquid or gas-solid mixtures.
This standard is applicable only to those designs of multistage multipath control valves and multistage single path control valves.
| Standards | Relationship |
| NF EN 60534-2-5 : 2004 | Identical |
| EN 60534-2-5:2003 | Identical |
| SN EN 60534-2-5 : 2003 | Identical |
| IEC 60534-2-5:2003 | Identical |
| DIN EN 60534-2-5:2004-03 | Identical |
| I.S. EN 60534-2-5:2003 | Identical |
| EN 60534-1:2005 | Industrial-process control valves - Part 1: Control valve terminology and general considerations |
| EN 60534-2-1:2011/AC:2015 | INDUSTRIAL-PROCESS CONTROL VALVES - PART 2-1: FLOW CAPACITY - SIZING EQUATIONS FOR FLUID FLOW UNDER INSTALLED CONDITIONS (IEC 60534-2-1:2011) |
| EN 60534-2-3:2016 | Industrial-process control valves - Part 2-3: Flow capacity - Test procedures |
| IEC 60534-2-3:2015 | Industrial-process control valves - Part 2-3: Flow capacity - Test procedures |
| IEC 60534-2-1:2011 | Industrial-process control valves - Part 2-1: Flow capacity - Sizing equations for fluid flow under installed conditions |
| IEC 60534-1:2005 | Industrial-process control valves - Part 1: Control valve terminology and general considerations |
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