Flow restriction... silly question

socalkol

socalkol

New member
So lets ask the silly question... All WW surface cleaners state a max flow of 10 GPM.... Is that restriction based on the gun? the swivel? Something else?

If its the swivel are there any modifications that can be made so that it can handle more?
 
I ran 10.1 through a WW yesterday and it bypassed about a 1/4 gallon. That could be because I used 6.5 nozzles that only let 10 gpm through. 1/2" hose might help, but the swivel might choke it down. Maybe the tolerances are slightly more than 10 gpm on the swivel. I hope! I'm going for 10 gpm too!
 
Ralph Q said:
I ran 10.1 through a WW yesterday and it bypassed about a 1/4 gallon. That could be because I used 6.5 nozzles that only let 10 gpm through. 1/2" hose might help, but the swivel might choke it down. Maybe the tolerances are slightly more than 10 gpm on the swivel. I hope! I'm going for 10 gpm too!
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Ralph, 2 - 6.5 nozzles are a size 13 (13 gpm) where do you get 10?...I bet that's why it's moving too slow
 
Johnson said:
Ralph, 2 - 6.5 nozzles are a size 13 (13 gpm) where do you get 10?...I bet that's why it's moving too slow
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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/
 
Michael DeRose said:
Ralph I posted the gpm and psi I wanted. The chart tells me 9.5 nozzle size. They don't make a 250475 so which would be better 25045 or 2505?
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Unless you don't mind losing a little bit of flow, the 25045's work. Personally I would use the #5's, just because full flow is what I want, and I don't want to wear out my unloader.
 
socalkol said:
I am gonna put 2- 10 GPM machines minimum on my truck Doug. I wanna tie them together for surface cleaning and turn a maxima into a floater!
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I think that would be classified as a UFO.
Problem with that much flow Jeff is flooding. Any area with drainage problems you will be sorry!
 
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