Pressure Valve Chattering 6

[erdemm]

Hello,

I am still working on a project about "chattering" in pressure relief valves.

My question is:
1) What is the "main" cause of chattering? (pressure loss within the valve?)
2) What are the other important causes?
3) How do those causes make the system to chatter?

Thanks in advance
Erdem Ogut

 

[JAlton]

Regarding Terminology, Appendix G was already a part of the
National Board Inspection Code when Appendix J was added by the Sub-Committee on Overpressure Protection:

APPENDIX G — SAFETY VALVES ON THE LOW-PRESSURE SIDE
OF STEAM PRESSURE REDUCING VALVES

APPENDIX J — GUIDE TO JURISDICTIONS FOR AUTHORIZATION OF
OWNERS-USERS TO MAKE ADJUSTMENTS TO PRESSURE RELIEF VALVES

Of course NBIC users of both sections employ the abbreviation PRV.

J. Alton Cox
President
DeLuca Test Equipment

http://www.delucatest.com

 

[erdemm]

Dear All,

Thank you for your great help.
You helped me to comprhend the logic of the problem very well.

Kind regards,
Erdem