Pressure -- non-compressed gas through an orifice

[spencermauro]

I have 1/4" diameter tubing (tightest point prior to valve) leading to a solenoid valve with a 2.5 mm orifice. I am trying to compute how much pressure it would take to move 1 and 2 CFM of 190C air through the valve (to atmosphere). I am using blowers and I don't know if they will be able to generate enough pressure..

 

[Simon Bridge]

You could do a back-of-envelope using incompressible flow ... but what you probably want is "choke flow" or flow through a nozzle.
http://www.tlv.com/global/TI/calculator/air-flow-rate-through-orifice.html

 

[spencermauro]

The calculator only goes up to 99°C and I am running 190°C. Any other online calculators?
Thank you for replying