Flowrate and pressure control for a spray ball

[Alphite]

My first post, I'm having some trouble with getting the right flowrate/pressure for a spray ball.

Rotating spray balls require a flowrate and pressure for optimal operation. One condition could be 10gpm/30psi, while another could be 12gpm/40psi. Is there a way to control both flowrate and pressure with a positive displacement pump? I'm not sure how to increase the system head and maintain it, especially when I assume that the spray ball is open to the atmosphere...

Thanks for any help, hopefully this is an easy question.

 

[Latexman]

No, the spray ball will have a certain backpressure at a certain flow rate (x). y = f(x)

Good luck,
Latexman

Technically, the glass is always full - 1/2 air and 1/2 water.

 

[Alphite]

Thanks!! I guess you've had experience with this?

I was also thinking that the spray ball would generate a fixed pressure at any given flow rate. Then I asked the vendor to confirm and the rep told me that was not the case...