ISA RP75.23 : 1995

1 Scope
2 Purpose
3 Definition of terms
4 Nomenclature
5 Overview
6 Cavitation index and valve scale effects
     6.1 Application dependencies
     6.2 Equations for scaling the cavitation
          coefficients
7 Applications
     7.1 Method
     7.2 Valve information
     7.3 Operating levels
     7.4 Considerations for selecting cavitation limits
     7.5 Cavitation-resistant valve designs
     7.6 Examples
8 Testing
     8.1 Scope
     8.2 Test system
     8.3 Test fluid
     8.4 Test procedure
     8.5 Data evaluation
     8.6 Laboratory qualification
Annexes
A - References
B - Cavitation fundamentals
C - Cavitation damage intensity and service life
D - Net pressure drop corrections
Figures
1 - Cavitation parameter plot
2 - Flow test system
3 - Cavitation detection equipment
4 - Cavitation calibration test manifold
B.1 - Cavitation scale effects
B.2 - Cavitation influences
B.3 - Typical flow curve appearance
B.4 - Flow curve appearance:two flowpath butterfly valve
Tables
1 - Numerical constants for cavitation equations
2 - Pressure scale effect exponent
C.1 - Range of estimated values of duty cycle factor, FDC

This recommended practice is intended for control valves used in the control of process fluids and is not intended to apply to fluid power components.