itchyudder,
Can you confirm your source for this information?
The Patent on the CCI Drag Trim Elaped in 1994, and as such no patent infringement could have occured. The RAVEN trim has already been accepted by the US Patent Office due to a number of unique features that make it very different...
Davefitz's reply gives the reasons behind the limitations for valve outlet velocity.
If you get a copy of the European Standard "Control Valve Aerodynamic noise prediction method" (IEC-534-8-3:1995) the scope and limitations section limits the standard noise prediction to 0.3 Mach -...
tsenthil,
Try this link
www.fabcoplastics.com/catalog/section9.htm
the catalogue from page 39 to 60, you have to download/open the pages individually but it may be worth your while.
Includes ABS, CPVC,PP,PVC,PVDF,TEFLON,BUNA-N, HYPALON, NEOPRENE, FLUOROCARBON & metals.
Thanks for the star...
Just a reminder - check the vendors used the vapour pressure you supplied in their calculations,assumptions are sometimes made by the sizing software which don't tie in with the data supplied by customers.
If they have they given you the cavitation index for the...
I think the valve you are looking for will need to be a multi-stage trimmed valve. Your application will be prone to serious cavitation due to the high pressure drop (1365 psid) - you will have to give the valve manufacturer the vapour pressure for the oil (assuming there is only one).
A...
You may want to consider a modulating pilot operated valve which would give the least working/set pressure differential combined with the lowest blowdown. Further details and links are in thread408-52271 - "pilot operated safety valve" in this forum.
Normal conditions are generally 0ºC & 760mm Hg, standard conditions are 60ºF & 14.7psia - however different standards are used for "normal" in different industries so you need to confirm what standard your client or subject is using.
I tend to use the Uconeer conversion software, cos...
I don't think that using a globe valve would lessen the clogging problem, the flow path through a globe valve is convoluted which would probably increase the clogging effect.
A valve with as close to a straight through flow path would lessen the clogging, also a self cleaning action for the...
The most appropriate method of control depends on how you want the valve to act.
If you need the valve to stoke fully open on 'trip' within two seconds but do not require modulating control within the two seconds then a separate high capacity solenoid can be used as a dump valve to evacuate the...
