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

Specifies general cylinder valve design, design qualification, required markings, and performance requirements such as operating temperature limits, pressure ranges, operating torque limits, and flow capabilities. Also provided are testing and maintenance requirements.