CONSIDERATIONS FOR EVALUATING CONTROL VALVE CAVITATION

Available format(s)

Hardcopy

Language(s)

English

Published date

01-01-1995

Publisher

International Society of Automation

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

Designed for control valves used in control of process fluids, and not designed to cover fluid power components. Reader and user should be familiar with fluid mechanics fundamentals and ISA standards ANSI/ISA S75.01 and S75.02 on valve sizing and testing. Definitions of terms are meant for general understanding, more rigorous definitions are in the references. Noise measurement and prediction methods are not covered. Specifies state-of-the-art information about control valve cavitation. Includes information on cavitation parameters, methods of evaluating cavitation through testing, and guidelines for selection of valves.

Committee	SP75
DocumentType	Standard
Pages	60
PublisherName	International Society of Automation
Status	Current

BS EN 60534-8-4:2015	Industrial-process control valves Noise considerations. Prediction of noise generated by hydrodynamic flow
PIP PCECV001 : 2016	GUIDELINES FOR APPLICATION OF CONTROL VALVES
13/30282237 DC : 0	BS EN 60534-8-4 ED 3.0 - INDUSTRIAL-PROCESS CONTROL VALVES - PART 8-4: NOISE CONSIDERATIONS - PREDICTION OF NOISE GENERATED BY HYDRODYNAMIC FLOW
AWWA M49 : 2017	BUTTERFLY VALVES: TORQUE, HEAD LOSS, AND CAVITATION ANALYSIS
I.S. EN 60534-8-4:2015	INDUSTRIAL-PROCESS CONTROL VALVES - PART 8-4: NOISE CONSIDERATIONS - PREDICTION OF NOISE GENERATED BY HYDRODYNAMIC FLOW
03/300069 DC : DRAFT JAN 2003	IEC 60534-8-4 ED.2 - INDUSTRIAL PROCESS CONTROL VALVES - PART 8-4: NOISE CONSIDERATIONS - PREDICTION OF NOISE GENERATED BY HYDRODYNAMIC FLOW
EN 60534-8-4:2015	Industrial-process control valves - Part 8-4: Noise considerations - Prediction of noise generated by hydrodynamic flow

IEC 60534-8-2:2011

Industrial-process control valves - Part 8-2: Noise considerations - Laboratory measurement of noise generated by hydrodynamic flow through control valves

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ISA RP75.23 : 1995

Current

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