Indeed valve (as a type and function) do not have major changes for the last century.
Improvement aimed most to make the valve more compact and light (e.i. Pressure Seal bonnet); Minimize friction (Rising stem Ball valve; Triple Offset Butterfly valve; etc.) and aiming for limited leak path (Bellows Sealed, packing improvement, etc.).
All comes with pros and cons:
- Some operator do not like Bellows Sealed since it may entrap very toxic service (hazardous during disassembling the valve)
- Pressure seal bonnet susceptible for fatigue, and fluctuated pressure also susceptible for leakage.
Majority of oil and gas company not yet cascading the proper Process information thoroughly (only scanned datasheet in SAP, SharePoint, etc.)
However our Process condition also change. What used to be robust valves for the last 20 years, now initiate vibration, and other problems. Some of them due to Process changes.
Recommended software Program for Valve beginner is sizing and calculation.
flow modelling may not be quite helpful for us now. But once the plant grow or modified, the wheel invented today maybe useful as input for future development.
Otherwise, Valve engineer 20 years from now will tackle the same problem as we were facing 10 years ago. I am not fully agree with your statement. Someone need to start the "evolution"
Regards,
MR
All valves will last for years, except the ones that were poorly manufactured; are still wrongly operated and or were wrongly selected