Constant volum/pressure pumps

Hi; Can some one give me the low down on constant volum/pressure pumps that are 3 phase power.
Thanks
Bob

www.cyclestopvalves.com/comparisons_3.html

www.cyclestopvalves.com/video/commercial-dsl.wmv

Lots more on this subject on this web page.

JustBob said:

Hi; Can some one give me the low down on constant volum/pressure pumps that are 3 phase power.
Thanks
Bob

Click to expand...

Most pumps can be powered by either single phase or 3-phase motors.

What characteristics are you looking for from the pump? It is not clear what you mean by "constant volume/pressure". Are you looking for constant volume; or are you looking for constant pressure?

What flow rate and what pressure are you trying to achieve?