seawater boost pump in ro application

[obnox]

I'm seeking my most cost efective solution.
flow=240 gpm, input 745 psi, output 820 psi
continuous use!

 

[butelja]

There is an interesting device called a hydraulic turbocharger that you may want to look into. There is information on it at:

http://www.pumpengineering.com/