What is the equation to calculate Cv?

The Formula is:

Q = C * √ΔP

Q = desired flow
C = valve flow rate (from table below)
ΔP = psi

Example:
For a 3" valve  C = 170 gpm at  1 psi

Let's say that you want to know what the flow rate is at
a pressure of:
Δp = 0.85
and
Δp = 3


For the first psi of 0.85:

Q = 170 *√0.85 = 156.74 gpm

For the second psi of 3:

Q = 170 *√3 = 294.45 gpm


Asepco Valve Cv's (at 1 psi):

0.5" 02.8 gallons per minute (gpm)
10.6 liters per minute (lpm) 
1.0" 15.8 gallons per minute (gpm)
 60 liters per minute (lpm)
1.5" 32.0 gallons per minute (gpm)
 121 liters per minute (lpm)
2.0" 72.0 gallons per minute (gpm)
 273 liters per minute (lpm)
3.0" 170 gallons per minute (gpm
 643 liters per minute (lpm)
4.0" 302 gallons per minute (gpm)
 1143 liters per minute (lpm)



Would you like to...

Print this page Print this page

Email this page Email this page

Post a comment Post a comment

Subscribe me

Add to favoritesAdd to favorites

User Opinions (43 votes)

95% thumbs up 4% thumbs down

How would you rate this answer?

Helpful
Not helpful
Thank you for rating this answer.

Visitor Comments

No visitor comments posted. Post a comment

Related Questions

No related questions were found.

Attachments

No attachments were found.