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Self Serve wand nozzle question

W

whitebirch

Member
What size nozzle do you think works best. I am using a 2508 and am not happy with the pressure. I would like to have something with more pressure but still keep water usage down.

Thanks
 
I run 2506 at 1200 PSI - I've stayed with 2506 because of possible drought requirements that would enforce 3 GPM. I also prefer the V-spray over the MEG tips. MEG tips were meant for very high impact at very close range, but most of the cleaning power is gone more than 6" away from the surface. V-spray tips are much stronger at 18" away.

What pressure are you running? What type of wash - normal car bays or trucks?
 
I just switched to 25055; running at 1200. This saves .2 gpm with no noticeable difference over the 2506. Just preparing the upcoming drought issues, as well.
 
Etowah
Whitebirch-

We replaced our 1/4in high pressure hose with 3/8in and have 1507 nozzles, I've wanted to move up our 3hp motors with 5hp motors, the wash on the other side of town from us had 3hp baldor motors with cat 5CP2120W pumps with 2507 nozzles and switched to 5hp and it made a "major" pressure differance, but as for water consumption doing that I have no numbers.
 
DiamondWash said:
Whitebirch-

We replaced our 1/4in high pressure hose with 3/8in and have 1507 nozzles, I've wanted to move up our 3hp motors with 5hp motors, the wash on the other side of town from us had 3hp baldor motors with cat 5CP2120W pumps with 2507 nozzles and switched to 5hp and it made a "major" pressure differance, but as for water consumption doing that I have no numbers.
Click to expand...
Switching from 3 HP to 5 HP motors alone won't make a difference in pressure. Obviously if you increase the pressure above what the 3HP motor can provide when you switch to 5 HP motors, then you'd have the ability to make more pressure than you did before.
 
whitebirch said:
Running 1000+psi. self serve for cars.

Thanks
Click to expand...
2508 tips at 1000 PSI means 4 GPM. You might try a smaller tip, perhaps a 2507 at 1200 PSI - you'll still be using less water, and I'll bet it will clean better.
 
Pressure over volume, it all starts at the tip. You have to determine what you want. IE: Truck wash = 5 to 10 gpm @ 2000 psi. Car wash = 3 to 5 gpm @ 1000 to 1500 psi. Go to the charts and select a tip for your application and customers. Work your way back to the pump and set rpm to match the pump capacity as to the tip. With this you can determine the hp needed to push the water through the size of tip selected. Use a press regulator to fine tune. If setup is right the regulator should peak at the predetermined tip to pump setup, do not over tighten your pressure regulator, that will just spike your pump and you will pay for that. IE: If you determined that you wanted a setup of 1400 psi @ 4 gpm when you set the regulator you should not get a reading above 1400 psi. I allow a little extra above predetermined mark to allow for tip wear. The hp break over is around 1200 psi @ 3 gpm for 3 hp and 1500 psi @ 5 gpm for 5 hp. Any thing above this you will be getting into the SF on your motors. My setup for car washes is 4 gpm @ 1400 psi and I charge more than my competition and have lines and they don?t. At my SS truck washes it?s 7 gpm @ 2000 psi, that takes 7 hp. If water consumption is a problem just adjust down but never below 3 gpm and 1000 psi. Water droplet size determines the energy transferred to the surface, the larger droplet the more energy sent to the surface. IMEGS will send the largest droplets to the surface and more energy transference. Think of rain drops and 140 mph hitting you car hood, big drops more energy and mist no energy simple as that. Have a good day!
 
Nice job J. Clean and precise information that should be helpful to any operator with a motor hp, tip, to psi question. I will post it on my bulletin board for future reference. Well done.
 
I use a 1505 nozzle with a Cat 310 pump powered by 3 ph 3 hp motor running at 1500 psi. I've been running them like this for only 26 years, never replaced a motor and only 1 pump.
 
whitebirch said:
What size nozzle do you think works best. I am using a 2508 and am not happy with the pressure. I would like to have something with more pressure but still keep water usage down.

Thanks
Click to expand...

I use a 2507 @ 1500 PSI. works good. I would like to find some 3507's which would be better.
 
V-spray tips are much stronger at 18" away.

I did a google search on these and can't find them, where do you get them Mep? Thanks Terry
 
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