Limited Pressure, big bucks!!

[Washnroll]

I have a customer that needs a building cleaned that is made of some kind of aluminum or other space age metal that is fairly thin. He is concerned that the pressure from the cleaning wand will hurt the building and wants to be sure I don't have more than something like 150 PSI comming out of my nozzle.

So How do I measure the pressure at the nozzle accurately in order to:

a, not destroy his building

b, keep this great contract that nobody else wants, (He is paying big bucks as long as the pressure can be accurately demonstrated to be within his specs)

Thanks, any help is appreciated.

 

[R L S]

Would using your soap tip work? It may not be 150psi but it should not damage the siding, if it does then somethings wrong with the siding. Let chems do all the work.

 

[steve r]

I have a customer that needs a building cleaned that is made of some kind of aluminum or other space age metal that is fairly thin. He is concerned that the pressure from the cleaning wand will hurt the building and wants to be sure I don't have more than something like 150 PSI comming out of my nozzle.

So How do I measure the pressure at the nozzle accurately in order to:

a, not destroy his building

b, keep this great contract that nobody else wants, (He is paying big bucks as long as the pressure can be accurately demonstrated to be within his specs)

Thanks, any help is appreciated.

your chems will do the work not psi its the gpm that will rinse .tell your customer gpm will not hurt the siding.if it does there something wrong with the sidding.

 

[PressurePros]

Do a search on here for "nozzle chart". You will find the right nozzle to bring your output down to the pressure you are looking for. It's going to have a very large orifice. Second get yourself a $20 pressure guage, quick couple it and attach it right after your ball valve (at the wand). It will give your guy all the proof he needs.

 

[john orr]

Assuming you have a 3000 psi/4 gpm set-up, by changing the tip to something like a 12.0 or a 14.0, you will achieve your desired pressure. I don't know if a pressure guage will read low enough for you to demonstrate 150 psi, but you will be able to put your hand in the water stream without pain...that should convince your customer.

 

[Mark]

 

[Washnroll]

limited pressure

Thanks guys, I'll get on it directly.
Dave

 

[Washnroll]

huh??

Mark,
I have looked at the chart a buncha times and I am not sure what I am looking at...
would you please open my eyes a little???
Dave

 

[Mark]

The Numbers under "Nozzle Size" = The Nozzle size,
ie: 05 would be an 05# orfice nozzle such as a 1505
which is a 15 degree # 05 nozzle.

The numbers under the pressure correspond to the GPM
at that rated PSI with the nozzle size aligned to that GPM.

Hope that helps.

Try a presure gauge at the gun this will give
you an idea of what psi is coming out of the nozzle.

Feel Free to call me.

 

[Larry L.]

Say you have a 5gpm 3000psi rig,find your psi at the top of page and fallow it down until you see 5 under nozzel size which is the same thing as the gpm of your rig.I think it would be alot easer if the nozzel size would read as nozzel gpm.If you wanted to drop the psi from 3000psi to 2000psi look at the charts 2000psi and fallow it down until you see your gpm(5.00),look across and see what nozzel size you need to drop the psi to 2000psi,This does not drop your gpm,only the psi.Anyway whats how I read it and I still get crosseyed trying to figure it out.