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Pressure and nozzle size

MGSMN

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The math says 3hp should get you 4.38gpm @ 1000psi or 3.65gpm @ 1200psi. With 5hp its 7.3gpm @ 1000psi or 6.08gpm @ 1200psi. With my 2506 nozzles at 1200psi I should be using ~3.29gpm and ~2.7hp. So mathematically 3hp would work. The 516 pump is rated from 4-5 gpm depending on the pump rpm. My pumps are spinning at 950rpm (4gpm) and with my 5hp I should be able to pump up to ~1825psi with my 2506 nozzles to max out my set up.


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Greg

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Happy to help !
Depending on the application 5,3, or 2HP would work.

Will show Model 516 as example;
* produces 3 GPM @ 713 RPM, 2HP when pressure is set to 1000 psi.
* produces 3 GPM @ 713 RPM, 3HP when pressure is set to 1500 psi.
* produces 4 GPM @ 950 RPM, 3HP when pressure is set to 1100 psi.
* produces 4.5GPM @ 1070 RPM, 3HP when pressure is set to 1000 psi.
* produces 5 GPM @ 1200 RPM, 3HP when pressure is set to 900 psi.
* produces 4 GPM @ 950 RPM, 5HP when pressure is set to 1850 psi.
* produces 4.5GPM @ 1070 RPM, 5HP when pressure is set to 1650 psi.
* produces 5 GPM @ 1200 RPM, 5HP when pressure is set to 1500 psi.

Re; pressure & nozzle size;
Pressure is created by restriction of the pumped water flow through the spray nozzle(s).
No nozzle(s) or oversized nozzle(s) = Reduced or no pressure.
Pressure is controlled by a pressure regulator (or unloader).
Water delivered from the pump, which is not needed to meet a set pressure, is bypassed through the pressure regulator (or unloader).

Note water flow & size nozzle(s).
Water flow through a nozzle with vary with pressure, refer to Nozzle Performance Chart.
examples;
#5 nozzle passes 2.5 GPM when pressure is set to 1000 PSI.
#5 nozzle passes 5 GPM when pressure is set to 4000 PSI.
#6 nozzle passes 3 GPM when pressure is set to 1000 PSI.
#6 nozzle passes 6 GPM when pressure is set to 4000 PSI.

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Insure correct Motor RPM and pulleys.
Electric Motor RPM, Electric motor pulley diameter, & Pump pulley diameter determine Pump RPM.
Pump RPM determines its flow produced.

Helpful tutorial here pertaining to nozzles, HP, & pulleys;
* click "technical tips"

Happy to help !
Greg @ Arimitsu Pumps
 
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soapy

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I like my 1508 tips. When you hold the gun the 15 degree feel more powerful than a 25 degree and 15 has more cleaning power at the point of impact.
 

Randy

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This morning while I was mucking out bays waiting for the police to show for another vandelism call I was thinking about trying a 2505 nozzle then I thought why should I, I've only been using the 1505 nozzles for 30 years plus so why change now. Then the police showed up so I lost that thought.
 

Wheaton

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Hi everyone!
I’m running:
5cp2120w cat pump
Toshiba 5hp 230v 3 phase motor
7.5 kw ATV 320 VFD
2505 tip
Runs at about 1400


The VFD draws about 12 amps on the line side and 9.9 amps on the load side. My previous system was a 1 phase 5hp Leeson Motor, can say that I don’t miss it one bit.

I would definitely purchase an Arimitsu 516 when my 5cp2120 goes, it’s loud and resonates in the entire building.


image.jpg image.jpg image.jpg
 

MEP001

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I would definitely purchase an Arimitsu 516 when my 5cp2120 goes, it’s loud and resonates in the entire building.
It's loud and resonates in the entire building because you're running steel braided high pressure hose and don't have any sort of pulsation dampener.
 

Wheaton

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actually the first 3’ is hydraulic hose, the rest is stainless 1/2” stainless tubing mounted in poly blocking mounted on rubber belting .. it’s the pump itself that resonates the noise ... you couldn’t be more wrong.
 

MEP001

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So the first 3' is 2-wire hydraulic hose which has almost no give at all to the pressure, and the rest is stainless steel tubing that has NO give at all, and it's run along the building? That means the building itself is resonating to the normal pulsation of the pump. An Arimitsu plunger pump works in exactly the same way as a Cat plunger pump and won't be any quieter.

Of my six bays, one has 1-wire steel hose to the bay, and the whole building hums when it's running. The rest have Synflex nylon braid hose, and there's no noise in the bay of the pump running at all. What do I know though, I've only been doing this 39 years and have only worked on about 500 different car washes across Texas.
 

Greg Pack

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Are you using the VFD as a phase converter? Do you run it at 60hz?

Also, remember that PSI is properly measured at the nozzle tip. You can be 100-300 psi high at the gauge depending on friction loss. I had a 1/8" street tee with a nozzle and gauge that I put on the end of the gun to ensure consistent pressure in each bay. I would then mark my pressure gauge with a sharpee.
 

OurTown

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Anyone ever use the high impact tips?

In bays I use:
2507 meg
3.5 gpm
1200 psi
5hp

Are you asking about the IMEG tips? If so then yes we tried them for a while. I thought they worked better for high pressure functions and have a knife edge look to the pattern. For lower pressure functions they seemed to concentrate the liquid near the edges and had uneven coverage.
 

Twodose

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Yes IMEG tips. Uneven coverage on the edges, hmm, do you still use them?

I just talked to spraying systems and they said the MEG stands for male, even, guide vane, never knew that.
So I was just ordering tips from KR and they said they sell allot more of the tips without the guide vane.
So why do they call them meg if there is no guide vane in some? All the mfg #'s on KR say MEG.
I always thought the tips with the guide vane had more even spray, now im more confused than I was before..lol.


 

OurTown

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Yes IMEG tips. Uneven coverage on the edges, hmm, do you still use them?

I just talked to spraying systems and they said the MEG stands for male, even, guide vane, never knew that.
So I was just ordering tips from KR and they said they sell allot more of the tips without the guide vane.
So why do they call them meg if there is no guide vane in some? All the mfg #'s on KR say MEG.
I always thought the tips with the guide vane had more even spray, now im more confused than I was before..lol.

Yes I also thought that was confusing about the guide vane. We do not use them anymore and switched to the VV style.
 

MEP001

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Spraying Systems MEG tips are hardened stainless and are more for descaling. They have really good impact less than 12" but lose most of it at more than 2 feet away. Veespray don't have the knife-edge spray and are safer, and they still have good impact at 3 feet. I've been using General Pump tips for years now, they have a hardened insert and last much longer than Spraying Systems veespray without eroding out, and are also a lot cheaper.

 

Wheaton

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Are you using the VFD as a phase converter? Do you run it at 60hz?

Also, remember that PSI is properly measured at the nozzle tip. You can be 100-300 psi high at the gauge depending on friction loss. I had a 1/8" street tee with a nozzle and gauge that I put on the end of the gun to ensure consistent pressure in each bay. I would then mark my pressure gauge with a sharpee.
VFD is 1 phase in 3 phase out. I use a 10 second slow acceleration, 86 seconds runtime, works out to 76 seconds of run
time/ dollar.
This has heavily decreased my power bill and wear and tear, also gives people a slight delay in time to pull the wand out.
 
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