Down stream injector tip.

R

Ron Strickland

New member
Several people have come to us lately and complained that their downstream injector will not draw with more than 100' of hose. Typically,everybody uses a 2.1 orifice. Try switching to a 1.8 orifice and it will draw like a charm up to 300' and more.
Ron
 
Question< how do we know what size the orifice is?

Scott
 
Mine is 2.3mm its for 4-5.3 gpm,I thought the 1.8mm was more for 2-3 gpm.

Scott the book I order them from shows the orifice size,they just show 3 sizes 1.8mm for 2-2.6 gpm,2.1mm for 2.6-4 gpm and 2.3mm for 4-5.3 gpm.$9.50 for nonadjustable and 11.99 for adjustable.

Dang I just noticed under your name,hahaha.
 
You lose pressure when you extend your hose(The Wiz can tell you how much).
The 2.3 orifice hole needs to be smaller to accomodate the pressure loss.We have installed and tested many and they really do work. You would think it would bass ackwards but it's not
Ron
 

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It actually makes sense to me. I know that you lose about 150 PSI per 100 feet. In my line of reasoning I figure that the smaller orifice creates a lower pressure stream going through the orifice, because it of the water expading as it goes through. That would make a higher draw rate from the soap tank. I get it now. I guess I never really realized that the orifice size was different. I never really thought about it.

Bigboy, what catalog do you use to order parts from?

Scott
 
To "The Orginal Scott"

Your post above says you lose about 150 pis per 100 feet, I thought it was more like 50psi per 100 feet.

Can you or others clarify this please.

I have a 3000 psi at 5gpm, I normally run 100 feet but will be running at least 300 and maybe 400 on a job this week, how much psi can I expect to lose at that distance?
 
I can't find my book that tells me that stuff.:( I hate when my wife cleans my cave. I am running off of memory that it is 150 PSI. I don't think that the pressure loss is linear. I think it gradually loses less pressure per 100 feet as it goes. I would not worry about the pressure loss though. I don't think that it will make a significant difference.

Scott
 
Pressure loss in feet

Through the wonderful Wizard of Hot water, we have an answer:

Pressure loss from friction in 3/8" hose(aprox).

Length in feet 2gpm 3 gpm 4 gpm 5 gpm 6 gpm 7 gpm
100 25 50 90 130 220 300
200 50 100 180 260 440 600
300 75 150 270 390 660 900


THANK YOU WIZ for a quick response.
Ron
 
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Someone tell me how to line the chart up on the previous post about pressure loss.
Ron
 
hmmmm
I will try.

Length in feet 2gpm 3 gpm 4 gpm 5 gpm 6 gpm 7 gpm
100 25 50 90 130 220 300
200 50 100 180 260 440 600
300 75 150 270 390 660 900

Pressure Lost

Hose lenght ?/100ft........?/200ft.......?/300ft.
2 gpm................?.................?...................?
3gpm------------- ?------------- ?---------------?
4gpm~~~~~~~?~~~~~~~?~~~~~~~?
ect.gpm?

would something like this work.
 
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If read correctly then my 3000 psi would lost 390 psi with 300 feet of hose, right?

Means I have 2400 psi, should not be a problem running my surface cleaner.

Now a dumb question, say I run my hot water at 180° would I lost much in way of temp at that lengh?
 
Jon,
Buy a temperature gauge that has quick connects to put on the end of your hose to get an exact temp reading at that point.

I bought from envirospec a dual gauge set up that has psi and temp gauge with quick connects where I can connect it to the end of my hose and to my flat surface machine, wand ets and I can get exact psi, temp reading. I think I paid around $20 for this set up (that was a sale price). They have an internet catalog at www.envorospec.com they have a temp gauge there listed for $9.95. Get the quick connects for it also if you purchase a gauge from here or wherever you get one.

Oh by the way you will lose some temp. by the time the water gets to the end of the hose.

John/Clean County PW
 
Thanks John,

My machine came with built in pressure gauge but your idea sounds better, can always check to see what it puts out at the point that it counts most.

Wonder if there is a way to connect it so the dual gauges can be mounted on the handle of the surface cleaner then down to the spinner bar, so I can always see what it is putting out as I work?
 
Where they is a will,there is a way....sure you can Luckyboy but why,cann't ya tell by the feel and looks,all good power washers can,lol......seen any deer yet....it opens here next month......me getting bow and arrow ready,caNN''t find my feather for my head band,guess I';ll have to shoot another crow.
 
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