EN 60534-2-2:1993
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Industrial-process control valves - Part 2: Flow capacity - Section 2: Sizing equations for compressible fluid flow under installed conditions
01-10-1998
16-03-1993
National foreword
Cooperating organizations
Specification
1 Scope
2 Definitions
3 Installation
4 Nomenclature
5 Sizing equations
6 Piping geometry factor FP
7 Expansion factor Y
8 Pressure differential ratio factor xT or xTP
9 Specific heat ratio factor F gamma
10 Compressibility factor Z
Appendices
A Rigorous expression for the expansion factor Y
B Other sizing equations
Tables
I Numerical constants N
II Representative xT values for full size trim at full
rated opening
AI Values of gamma and sigma gamma
BI Numerical constants N
Figures
1 Pressure tap locations
AI Expansion factor vs. pressure drop ratio for widely
differing values of Fg (for gamma = 1.4, air)
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