Flow restriction... silly question

this calculator will let you punch in any two parameters and give you the other plus tell horsepower needed.http://www.barens.com/cgi-bin/calc yes doug I did build that surface cleaner its a little much for everyday work but when you have a substantial amount of concrete it gets it done.
 
Ralph Q said:
It doesn't work that way. #13 nozzle for 10 gpms would be 4000 psi. When I tie my two machines together, my psi is 2500 because my 5.5 gpm machine is 2500 and when tying together you get the lower psi of the two. Straight nozzle calculations are based on 4000 psi. EX: a 4 gpm machine rated at 4000 psi uses a #4 nozzle, a 4 gpm machine rated at 3500 uses a 4.5 nozzle, a 4 gpm machine rated at 3000 psi uses a #5 nozzle. 10 gpms at 2500 psi uses a #13 nozzle.

The #13 is just the orifice size not gpms. The only time it matches up with the gpms, is when your are dealing with 4000 psi.

http://www.pressureparts.com/nozzlecalculator.aspx/
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I get all that. Just for fun I would try smaller nozzles and see what happens....if you haven't already.
 
Johnson said:
I get all that. Just for fun I would try smaller nozzles and see what happens....if you haven't already.
Click to expand...
Good idea, I have a bunch of 5.5's. with 250 feet of hose on the reel I lose psi. Not sure about the flow though. Maybe I need a smaller nozzle to keep the bar spinning as fast as possible. Gonna try.
 
Ralph Q said:
Good idea, I have a bunch of 5.5's. with 250 feet of hose on the reel I lose psi. Not sure about the flow though. Maybe I need a smaller nozzle to keep the bar spinning as fast as possible. Gonna try.
Click to expand...

I think that would help.
 
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