Spray Gun Pressure

[robi]

I have devilbiss sri pro spray gun. What pressure should i be spraying at?

For spraying alloy wheels.

Thanks

 

[Raf]

what paint type are you asking for?

i only use mine for basecoats; depending on the size of the fan i want i adjust air pressure accordingly. usual range is from 1.5-2.5 bar.

 

[pedrobedro]

The specs for the gun say it uses 3.5cfm at 2 bar which is about 30psi, have a read on sprayguns direct website. Didn't you get any instructions with it? It sounds a bit overkill for spraying wheels, we get a perfectly good finish with a £12 cheapy from ebay.

 

[robi]

I use 2k paint. I usually spray at 45psi but my paint supplier just told me i should be spraying at 70 psi. Would i get a better finish using a higher psi?

 

[brightspark]

I use 2k paint. I usually spray at 45psi but my paint supplier just told me i should be spraying at 70 psi. Would i get a better finish using a higher psi?

i spray about 50psi it depends on thickness of paint and what type. if pressure 2 high it blows the paint allover and causes a lot of overspray. just practice on a tin can 1st till get the best results

 

[Engineer]

Depending on the length and diameter of the air line you are using you may well need to have 75psi at the pressure reg to get a reasonable finish. Quite a few people dont realise that there is a pressure drop between the reg and the end of the airline, and end up using too low pressure.

 

[langy]

I may be wrong but i'm pretty sure that gun is HVLP so it shouldn't be 70 psi !!!
I pretty sure that gun is used for spot repairs mostly.

 

[robi]

I may be wrong but i'm pretty sure that gun is HVLP so it shouldn't be 70 psi !!!
I pretty sure that gun is used for spot repairs mostly.

I just checked and you may be right, although the spray pattern can be opened up to give a full 180mm fan

 

[langy]

HVLP guns usually run at about 40 psi, If you stick 70 through it won't do it any good.

I just checked and you may be right, although the spray pattern can be opened up to give a full 180mm fan

 

[robi]

I have been using it at 70 psi for a long time now and the finish is very good, would i get a better finish if i sprayed at 40psi? Or will spraying at 70 psi damage the spray gun in the long term?

 

[robi]

I just checked my guns, one is a ts1 trans tech which i use for applying the clear coat, and the other is a hs1 hvlp which i use for applying the basecoat.

 

[langy]

I mistakenly put 60psi through mine one day and it spoilt the seals.
You will have a lot less over spray.

I have been using it at 70 psi for a long time now and the finish is very good, would i get a better finish if i sprayed at 40psi? Or will spraying at 70 psi damage the spray gun in the long term?

 

[robi]

I mistakenly put 60psi through mine one day and it spoilt the seals.
You will have a lot less over spray.

Spolit the seals?

 

[marc76]

I have devilbiss sri pro spray gun. What pressure should i be spraying at?

For spraying alloy wheels.

Thanks

Spray guns of low pressure are needed for an even finish with metallics and its more economical, too.