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Reply by OSU55

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Posted on Spray gun vs compressor

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OSU55

1364 posts in 1773 days


#1 posted 11-03-2015 01:07 PM

It’s a function of how fast you need to apply finish, i.e. how large an object are you going to be spraying. For small boxes, bowls, picture frames, knick knacks, 1 or 2 items at a time your compressor will work. Full size furniture, no, it won’t keep up. As a hobbyist, HVLP or LVLP is what you want. Here is a good comparison of HVLP conversion and turbines http://www.spraygunworld.com/Information2/Compressors/Whatisacompressor.html.

I use a conversion HVLP with a compressor. Compressor is 1.6 hp, 150 psi, 5.3 cfm 90 psi, 6.2 psi 40 psi, 110v, 2 cyl oil lubed. The gun is rated at 13 cfm. When spraying a large kitchen table top, I will need to let the compressor catch up, but it isn’t a problem. Anything smaller is not a problem because the gun off time is enough to let the compressor keep up. I don’t have issues with water, and it gets humid in Missouri in the summer. I use a small disposable inline filter made for spraying.

If one doesn’t need compressed air available, or needs portability of the sprayer, then a turbine HVLP can be considered. The turbine and gun HVLP’s are more or less matched sets (a different model, not a replacement), so changing to a different gun means changing both. With compressed air, just the gun can change.

The media to be sprayed makes a big difference, particularly solvent vs water based. Atomization of the finish is key to a great finish. Solvent finishes can be thinned a great deal and made to work with about any gun. WB finishes have limits on how much they can be thinned. IMO WB finishes need a gun designed for WB to get proper atomization for a great finish. Some have complained when using turbine systems with water based finishes, others say they work fine. I don’t have experience with them. Either gun design will need multiple tips to deal with different viscosity materials.


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