Control valve sizing.

[Indy]

Hi,
With regards to control valve sizing can anyone point me in the direction of the standard/steps that are required to properly size a control valve.

Thanks

 

[LittleInch]

Try the fisher control valve handbook

http://instrumentationandcontrol.net/fisher-2001-control-valve-handbook/

Or search for it.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[Indy]

Thanks for the reply. I will download it.

 

[RVAmeche]

General rules of thumb for pneumatically controlled valves:
1) Try to make all flow scenarios fit between 20% open percentage and 80% open percentage
2) dP at design point should be 10 psi or 10% system pressure, greater of the two
3) Typically the valve will end up being one line size smaller (ie, 4" valve in a 6" line)


That's the absolute basics and then you get quotes/manufacturer data and figure out which valve will work best.