They are exponential it just doesn't seem like it because we only see the bottom of the curve. And one of the reasons centris have such good efficiency up top

Sent from my HTC One using Tapatalk 4

Sorry guys, I should have used PR not gauge. Root of PR.

Standard day
16 psi @ 7500
4.08 psi @ 2500

10 psi @ 7500
2.7 psi @ 2500

Yes it is squared, pressure ratio vs impeller rpm. (ideal)

Apologies, Rob

Never do maths in public.

Always do math in public, or else some times you can have misconceived notions, such as the one just witnessed.

I'm an EE, not a fluid guy.

Or simply don't claim you know stuff unless you are 100% certain but ask instead.
Engineers aren't typically known to be eyeball science/math magic wand wavers, AKA " looks good" fire hazard type of people :D

How do you know if somebody's an engineer? Don't worry - they'll tell you.

:happy0180:

This is true.

Me: And this is our newest employee, Mr......
New Guy: Engineer. Automation, engineer. (twirls calipers and clicks pen)
Me: .....so as I said, Jeff will be working on the new conveyor line....
New Guy : ENGINEERING the new conveyor line (scoffs and adjusts his junk)