Engine - General Subjects #1077 | U.S. Coast Guard Questions and Answers

For a pneumatic transmission system for instrumentation purposes, if a pneumatic instantaneous flow indicator has a calibrated scale of 0 to 1000 gpm, what would be the actual measured instantaneous flow rate if the transmitted pneumatic signal pressure to the indicator is 9 psig, assuming the industry standard of 3 to 15 psig is used for instrument air?

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ma magnussonshred · Sep 14, 2016

What's the equation for this one?

by bybymsn · Sep 16, 2016

The regulator range is 3-15 psi, a difference of 12 psi. So, since 3 psi is the minimum an input of 9 psi would actually be 50% (9 psi minus 3= 6 psi). And 50% of 1000 is 500 rpm. What they're talking about is a pneumatically controlled flow valve. One of these:
http://www.lesliecontrols.com/iomindex/20_1_5_2Rev3.pdf

jb jbenavente · Aug 30, 2018

I wish all the questions had the formula's.

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