Simulating a control valve

[Destroyer]

Hello,

I need to simulate the working of a control valve (all kinds of valves) and then I need to analyse the results of the different types of valves to choose the perfect one for my application. So I thought to simulate a constant flow, then the caracteristic of the control valve, and at the output I need to simulate a random client who needs a different flow but a constant pressure. So I have an input with a fixed flow, and the pressure I need to regulate with a control valve so that it stays constant. The medium is air.
Can anyone help me with such a simulation?????

Thanks a lot

 

[Lewish]

Are you trying to do this in Simulink or SimMechanics?

 

[Destroyer]

In Simulink.