What is advantage of 3 bar vs 2 bar on SC

A

Al Patterson

Member
On flat work seems like a 2 bar would clean better than a 3 bar because you have more psi per nozzle,
If that is the case when would a 3 bar be more proficient.
Lets say the gpm is 6-8 and psi 3500 -4000 on a 24"
 
We like the 2 over the 4.
I didn't try a 3 bar. I think that the bar will spin faster with the 2 than the 3.
With a 6 or an 8 I'd stay with a 2. 8 gpm it will fly.
 
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There is no way around getting each one and trying it out. And different degree tips. And tilting the tips at more or less angle - you may be missing the best one. To each his own. It will depend on your system - soap? heat? I think 2 bars sprays too hard on the cement and wears it. Let the soap do the work. I use nothing but 4 bars with 40 degree tips at 8-10 gpm and I wish for 6 bars at 15 gpm! More sprays per minute the better.
 
this is an issue we have contemplating lately. I think I will get the 4 tip big guy bar and do a little testing to see whats better. At worst case I can plug up 2 of the holes and use the two inside holes to make the 40* tip a little more effective
 
I have a 5lb weight on my 2tip 8gpm S/C to keep it from flying away!!
 
mobilewashpros said:
this is an issue we have contemplating lately. I think I will get the 4 tip big guy bar and do a little testing to see whats better. At worst case I can plug up 2 of the holes and use the two inside holes to make the 40* tip a little more effective
Click to expand...

That'll be a lot of extra weight for the 2 tips. How big is your machine?
 
Just remember...you need an average of 2 GPM per nozzle for most surface cleaners to work effectively. Part of the problem with changing a 2 arm surface cleaner to a 3 or 4 arm surface cleaner is the availability of the correct nozzles. To run a 4 GPM machine on a 2 arm surface cleaner you need 2.0 nozzles. This is the smallest nozzle size I have seen available, so finding the correct nozzles for a 3 or 4 arm machine is difficult. You would need a smaller nozzle than a 2.0.

How to determine nozzle size on a surface cleaner:

You should understand that the flow (GPM) of your equipment is divided by the number of orifices the water escapes through. The pressure (PSI) stays the same throughout the system. That means that if you have a 2-nozzle surface cleaner and your pressure washer puts out 4000 PSI and 4 GPM, you need to look on a nozzle chart under 4000 PSI AND 2 GPM when setting up your two-nozzle surface cleaner.
 
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