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Velocity pressure -> Velocity FPM

Velocity pressure -> Velocity FPM
by malcolmd83 on 01/11/05 at 06:36:14

Perhaps this is already available, but if it is, I wasn't able to find this conversion:

Velocity pressures for different velocities.  This would be a direct conversion from velocity pressure (in inches of water), to velocity (in feet per minute).

This is used, among other things, to measure air speed in pneumatic "material conveying" systems.

I have a table which I could submit, if necessary! Thanks for your time...

Re: Velocity pressure -> Velocity FPM
by Sam_Slaydon on 03/18/05 at 16:31:15

could this be used to convert PSI to velocity (fps) ?

Re: Velocity pressure -> Velocity FPM
by Engineer on 03/20/05 at 10:22:56


The pressure (differential) is p. The velocity in feet/second is v. The mass of air is approximately 0.002378 slugs.

v = sqrt[2*p/0.002378]

This is Bernoulli's Equation Solved with a constant density (greek letter rho, which looks like a p in most physics books). The p above, the pressure, is the difference between a reference undisturbed air and the moving air.

Good Luck

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