Convert cv rating to head additions

[goosegunner]

Trying to pin this down as close as possible

The Danfoss is easy cv rating of 20 so I add 2.31 head if flowing 20gpm for that correct?

Got some ratings for other things that are high so I am not sure what to add.

Legend full port ball valves
CV is 105

Taco 4900 series air separator
CV 49

What would you add if you were flowing 20 gpm?

or 30 gpm?

 

[ewdudley]

Check this out:

(broken link removed to http://www.haskel.com/Files/Haskel-en/Global/US-en/Cv_calc.html)

Just select water, your Cv, and the gpm, and it will give you pressure drop.

--ewd

 

[goosegunner]

Check this out:

(broken link removed to http://www.haskel.com/Files/Haskel-en/Global/US-en/Cv_calc.html)

Just select water, your Cv, and the gpm, and it will give you pressure drop.

--ewd

Thanks that is very helpful!

My valves have a drop of .0363 at 20 gpm or .0838 additional head per valve.

4900 air separator drops .1666 or .384846 head

gg