4 replies to this topic

[franchescamarie]

Hi! I am currently sizing a control valve but I do not know where to start. We have a control valve which was supposed to have a normal flow 323.655914 m3/hr instead of 32.3655914 m3/hr. However, as shown in the datasheet, what was considered is 10% only of the normal flow. We need to change the control valve in order to meet this normal flow wherein 10% of normal flow is the minimum flow and 110% of normal flow is the maximum flow. Thanks. What shall be the Cv of the valve?

Attached Files

•  Control Valve datasheet.JPG   78.51KB   3 downloads

[Zauberberg]

There are so many topics on control valve sizing on ChE forums. Have you tried the search feature?

 

There are also dozens of free resources on the web.

 

http://www.documenta.../book/cvh99.pdf

https://www.isa.org/...sa-750101-spbd/

http://www.parcol.co...1-I_05-2013.pdf

http://www.documenta...1798x012_11.pdf

http://www.swagelok....EN/ms-06-84.pdf

http://www.ascovalve...alveSizing.aspx

 

If you look at the control valve sizing equation for liquids, you can easily correlate the flow vs. valve Cv.

[breizh]

http://www.hassmfg.com/vscform.pl/
http://www.cheresour...g-and-selection



Consider these resources to support your work. Plenty of tools , papers are available in this forum , just try the search engine .

Hope this helps .

Breizh

Edited by breizh, 22 April 2015 - 10:45 PM.

[curious_cat]

Minor quibble, but those significant figures look funny.  32.3655914 m3/h.  

[Bobby Strain]

Just send the conditions to a valve supplier and let them size it for you.

 

Bobby