seawater boost pump in ro application

[obnox]

I'm seeking my most cost effective solution.
240 gpm flow; input 745 psi, output 820 psi; continuous operation. new, or used if anybody has this puppy laying around. thanks.

 

[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/