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I have developed a simscape model of a pressure regulator valve and I derive valve parameters from the valve datasheet. From the datasheet I get the following valve flow characteristic:

http://imagizer.imageshack.us/v2/150x100q90/c/707/3emx.jpg [Broken]

The flow rate is in normal liters, instead from simscape I get the actual flow rate, therefore I need to convert it. I found the following approximate formula to compute the normal flow rate from the actual one:

Qn = Qa x (Pa/Pn) x (Tn/Ta)

Where:

Qn is the normal flow rate

Pn is the pressure at the normal condition 1 atm

Tn is the temperature at the normal condition 293.15 K

Qa is the actual flow rate

Pa is the actual pressure

Ta is the actual temperature

Is it correct? In my case there is a valve where at the inlet there are 4bar and at the outlet there is 1 bar, so which pressure should I use for the computation of the normal flow rate?

Hopefully I have well explained my problem

Thanks.

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# From actual flow rate to normal flow rate

Can you offer guidance or do you also need help?

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