Flow rate for different fluids

Mar 2020
1
0
Israel
Hi,
I have flow rate vs mWg chart of diaphragm pump, now i want to know the flow rate of other fluid with different viscosity and density.
How do i apply the chart to those fluids?

P.S
This is the only chart i have from the supplier.
Best regards
 
Oct 2017
676
348
Glasgow
I don't think you can, at least not in a straightforward manner.

The only idea I have is that you could perhaps use the curve you have to estimate the friction factor for the whole pump as a function of flow rate, framed in terms of Reynolds number. Then you can use the friction factor for any fluid calculation to estimate head loss for the new fluid and consequently the flow rate response curve. I don't know whether that would work or not though.
 
  • Like
Reactions: topsquark
Jun 2016
1,370
696
England
The density you could probably allow for, the viscosity is the awkward one.
The flow behavior of fluids of different viscosities does not follow nice simple relationships
(see Reynolds Number)
How different are the fluids?
Unless they are reasonably similar, you might find that the pump will fail to work at all.
 
  • Like
Reactions: topsquark