Cv Flow Formulae
PeterPaul has created this page for you so you can calculate the flow or Cv (flow coefficient) to make the relationship visible between the pressure drop (the difference in pressure between two points of a liquid/gas carrying network) and the flow rate.
The use of this flow coefficient (Cv) calculator offers a standard calculation to compare valve capacities and sizing for a wide range of applications. The type and sizing of a valve or regulator can have a large impact on the performance of the assembly for transferring gas or liquids in the system.
Our sales department is ready to answer questions and to solve your valve needs. Please feel free to call, chat or email us.
Liquid Flow
Calculate Flow in GPM
PSI
GPM
Calculate Cv
GPM
PSI
Calculate P1−P2
GPM
PSI
Gas Flow P2 > 53% of P1 (subsonic)
Calculate Flow in CFM
PSIA
PSIA
°R
CFM
Calculate Cv
CFM
PSIA
PSIA
°R
Calculate P1 (approx.)
CFM
PSIA
°R
PSIA
Calculate P2 (approx.)
CFM
PSIA
°R
PSIA
Gas Flow P2 < 53% of P1 (sonic)
Calculate Flow in CFM
PSIA
°R
CFM
Calculate Cv
CFM
PSIA
°R
Calculate P1
CFM
°R
PSIA
DISCLAIMER: Gas flow is only an approximation using Cv.