Quote:
Originally Posted by rick-l
I would look at what HVLP gun you want for CFM requirements.
For some of the more popular models the compressors above are not big enough.
Something I've wondered about is on the painting forums they say the CFMs don't change for 40 or 30 psi because the pistons displace a constant volume. Is this true?
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Interesting thought about psi and volume. I don't think the ratings are as important as tank size once you get big enough (say the biggest you can run one 120v). With the big tank, you have a lot of volume to bleed off at a regulated rate while the air pump tries to keep up. If the air pump were to always keep up with our needs, they would all have to be the rotary type like you see towed behind trucks. Unless you have the trigger open in the blast cabinet for 5 minutes straight each time,, I think the one above will work well. There is a point of practicality here otherwise we'd all have massive 440v 3-phase units in our home garage.
The most important thing for me is the noise factor. Most belt driven units are not too bad. Direct drive in not for me.