CGA V 9 : 2012

1 Introduction
2 Scope
3 Definitions
4 Design considerations
   4.1 Valve connection
   4.2 Temperatures
   4.3 Leak rate
   4.4 Materials
   4.5 Cleaning
   4.6 Markings
   4.7 Pressure relief devices
   4.8 Specific valves
   4.9 Other valve components/devices
5 Valve types and descriptions
   5.1 Packed valves
   5.2 Pressure seal valves
   5.3 O-ring valves
   5.4 Diaphragm valves
   5.5 Post-type medical valves
   5.6 Reverse seated valves
   5.7 Remotely operated valves
   5.8 Additional valve types
6 Valve qualification and documentation
   6.1 General
   6.2 Documentation
   6.3 Valve qualification test procedure
7 Valve qualification tests
   7.1 Performance and qualifying test
   7.2 Conditional qualifying tests
8 Testing of production valves
9 Maintenance
   9.1 Inspection-general requirements
   9.2 Inspection procedure
10 References
11 Additional references
Tables
Appendices
Appendix A - Valve selection guidelines (Informative)
Appendix B - DOs and DO NOTs relative to valve use and
             abuse (Informative)
Appendix C - Performance standard for cylinder valve
             protection caps (Informative)
Appendix D - Oxygen pressure surge test (Normative)
Appendix E - Compressed gas cylinder valve figures
             (Informative)
Appendix F - Coding system for threaded cylinder outlets and
             threaded valve inlets (Normative)
Appendices Tables
Appendices Figures