What size air compressor do I need for spray painting?

by jan
(nc)

I got a spray gun and its rated at for 30psi inlet 10 psi at 13 cfm.

Paint spray gun - https://about-air-compressors.com
Paint spray gun

I got a spray gun and its rated at for 30psi inlet 10 psi at 13 cfm.

Will a 3hp compressor with a 30gal tank handle this


Answer

CFM for paint gun

Well Jan, since you can get about 4 CFM of compressed air at 90 PSI for each horsepower of electric motor size on the compressor, your compressor should, theoretically, give you about 12 CFM at 90 PSI.

However, if you are running your 3 HP compressor on a 120 volt supply line, then you sure are not getting that 12 CFM at 90 PSI, since, in my opinion, there isn’t enough power in a 120 volt line to power your compressor motor enough to give you that flow and pressure.

Why not have a look at some of these pages to understand in principle how to size an air compressor.

Anyway, depending on what you are doing with your spray gun (besides painting that is), I mean, if it is air brush work with intermittent use, and you have dialed your regulator down to the minimum operating pressure for the gun that gives you the spray you want, you will be able to work with your 3HP compressor. You will, depending on how much spraying you want to do at one time, likely have to stop periodically and let the compressor catch up.


Can this CP compressor run a HVLP paint sprayer?

by elda
(dawson pa)

Can i use a HVLP paint sprayer with central pneumatic 2hp 8 gal air compressor? What size air compressor to paint a car?

Central Pneumatic 2 HP 8 Gallon air compressor
Central Pneumatic 2 HP 8 Gallon air compressor

Answer

My Response: The answer is yes, of course you can, but you may not be happy with the result.

A HVLP paint sprayer uses low pressure air, and it has a minimum compressed air supply flow rate at that low pressure to operate properly, and that is the info that you have not supplied.

What is the pressure requirement of your HVLP paint sprayer, and what is the flow requirement in CFM?

Knowing this information, and also the output of your air compressor, will help you determine if you can run your HVLP paint sprayer.

Without that info, your question cannot be answered accurately.

A 2HP air compressor as shown “should” be able to deliver 3-5 CFM at 90 PSI or thereabouts, if that helps.

What flow and pressure do you need for the sprayer please?


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