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  • HVLP spray systems

    I am a new member to this forum - after "lurking" for several weeks now. I am a "rookie" in the field of woodworking but I'm eager to learn. I recently purchased the Rigid TS3650 and, so far, I've been very pleased. Still have a few minor adjustments to make, but I'm looking forward to beginning my first major project - a set of bookcases with adjustable shelving. Not too complicated,..I don't think.

    But, I'm wondering about the next step. Once I complete the bookcases, I want to apply a smooth hard surface finish. I've been exploring the various possibilities, including turbine HVLP spray units. I have a small (4 Gal / 1 HP) Craftsman air compressor - suitable for the air guns that came with it - but it's not large enough for a spray gun.

    Any feedback concerning the self-contained HVLP systems would be appreciated. Thanks!

  • #2
    A little dated but this should give you a good head start.

    http://www.toolsofthetrade.net/artic...ticle&partID=1

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    • #3
      Here's another test.
      http://www.rd.com/americanwoodworker...LPSprayers.pdf
      "It's a table saw, do you know where your fingers are?" Bob D. 2006

      https://www.youtube.com/user/PowerToolInstitute

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      • #4
        I've never heard of hvlp.

        I used to use what we called a paint pot though, looks like this:

        http://www.harborfreight.com/cpi/cta...emnumber=93305

        Where there is a regulator forcing the paint up to the gun then you don't have to use so much spray to siphon the paint. Works good for a lot of things.

        I would think your compressor would run something like that.

        Was you talking about using this for paint or for a clear stain/finish?

        For stain/finish the only finish I do anymore is a penetrating resin. It's almost impossible to mess up and you don't spray it. It's not a high gloss though. Satin at most.

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        • #5
          Thanks!

          Thanks for the information, guys. Lots still to learn!

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          • #6
            HVLP Low pressure gun

            Just for you info, I've been using a garavity feed HVLP gun that runs off 30-50 lbs of air.

            I have used the gun with my 2 gallon mini compressor for spraying(waterbased Varathaine) on an antique dresser with perfect results. These guns are no longer expensive unlike turbine guns and their accessories.

            Turbines are a forgiving gun to spray with but fairly slow for production work. I find that I get better results and speed with my gravity feed HVLP gun.

            Look on the net and I'm sure you will find something out there, just make sure it uses low PSI.

            Glenn

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            • #7
              A "touch-up" gravity feed HVLP of reasonable quality will only run about $50, and will run off a small compressor. The advantage of the Touch-up size is that it is more maneuverable for spraying inside areas and can be adjusted to a finer spray pattern. (Don't confuse Touch-up gun with air brush, they are not the same).
              There are a lot of safety considerations to spraying. Atomizing a flammable substance greatly increases the potential for disaster. Pilot lights on water heaters,etc, the spark from a freezer in the garage, etc all may cause a bad end to everyone's in the neighborhood day. Although ventilation is a must, the commom electrical fan with open brushes on the motor will provide a very lively ignition source. Even some of the "water clean-up" coatings have alcohol (flammable) based solvents. (Check the label on the can) The overspray build-up also can be very flammable.

              And even of they aren't flammable, coating fumes can cause both short and long term damage to your internal organs. The first prerequisite is an organic vapor respirator (a dusk mask won't protect you from the fumes). The filter should have NIOSH marked on it and say it protects from OV. Also, realize the blood vessels in your eyes will absorb 10 times more toxic substances than your skin, so the more you can keep the paint particles way from your eyes (safety goggles help because full-face respirators are pretty expensive!) the better off you will be.

              I'm not trying to sound preachy, but I've been spraying coatings for over 30 years, and I personally won't crank up a spray gun in my garage or any other room attached to my home. I don't consider the benefits worth the risk to my family's safety. If you spray outside or in a detached workshop, please be careful. And practice on scrap first, until you get the trigger discipline down (start spray gun moving, depress trigger, spray while continuing steady movement and holding gun perpendicular to the surface, let up on trigger, stop spray gun movement). It will result in a lot less runs and better coverage. You can practice with a spray can to get the basic feel for it.
              Good luck
              Practicing at practical wood working

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