low pressure high volume paint guns

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  • June 07, 2008 10:40 PM - 3302 Views
    will547 Looking for information on using a LPHV paint gun. What pressure do you set the reuglator at. I have not been able top get a real smooth finish while painting with it.. I have been running the pressure around 15-20 psi at the inlet regulator,, Thanks
     

     
     
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  • Comments
  • Starfire Rides Info - weimar, Texas
    June 07, 2008 11:07 PM
    Starfire
    You should follow the pressure directions for the paint system you are using and for the type of gun you are using with that system. The paint manufacturer's data sheets should provide you with the proper pressure settings to get a good paint job. I suspect your regulator is set a bit on the high side for an HVLP gun.
     
  • JCCLARK Info - louisville, Kentucky
    June 13, 2008 08:55 AM
    There's no way one pressure can be right for all guns, they're all different.

    You use what your gun specifies.

    Most get 10 to 12 at the tip, but the inlet pressure to get that

    varies a lot by manuifacturer.

    I have guns that take 40 to 45 psi at the inlet,

    and guns that take 20 psi.

    check your gun specs.
     
  • Crazyhorse Rod Shop Rides Info Website - bluff dale, Texas
    June 13, 2008 09:02 AM
    Crazyhorse Rod Shop
    if it is a hf purple gun your screwed . it will never work. the best way to set a gun is on an old hood. start with 45 lbs at the wall, pattern wide open , fluid shut down. bring fluid up 1 turn per pass. you will go from dry to wet. then fine tune the pattern and fluid. most people have too much fluid , not enough air = orange peel or urethane wave as we call it. good luck.
     
  • prost56 Info - west seneca, New York
    June 14, 2008 09:38 PM
    have not had too much trouble,,got a dev.,set my wall gage at 60.and my inline regulater at 10-15...with an 04 tip..so far ok....if ya shoot bc/cc..two different guns will do best...even the new cars have some orange peel,,,so ahh
     
  • Starfire Rides Info - weimar, Texas
    June 15, 2008 01:06 AM
    Starfire
    Orange peel can often be caused by high humidity levels with today's paints regardless of how the gun is set up. Less than ideal humidity levels may require a different mix ratio which should be indicated on the product data sheets and/or containers.
     
  • Crazyhorse Rod Shop Rides Info Website - bluff dale, Texas
    June 15, 2008 07:06 AM
    Crazyhorse Rod Shop
    orange peel is too much fluid and usually not enough air . todays urethane paint are not designed to flow. you must shoot for effect. humidity causes iso clumping which will look like trash . this is why we no longer wet down the booth . paint gun set up is far more critical today than when we shot lacquer or enamel. what i have always told new painters when teaching is you need to apply smaller drops not big ones. in the old days you could just hammer it and it would all melt together and smooth out. not any more. an old hood is a great way to set up your gun before starting.

    in the words of the old paint peddler barry knives from spi

    run control = air pressure

    orange peel = fluid adjustment
     
  • DaveHughes Rides Info - seaman, Ohio
    June 15, 2008 09:52 AM
    DaveHughes
    one thing I might add is tip size is critical with todays paints- High solids clears need to be broken up to lay down properly- same goes for mettalic b/c
     
  • Crazyhorse Rod Shop Rides Info Website - bluff dale, Texas
    June 15, 2008 10:04 AM
    Crazyhorse Rod Shop
    your dead on dave. i use a 1.3 in my iwata. 1.4 for shooting epoxy. biggest problem is all the walmart guns they sell. develbiss has gone to the dogs as binks and most others.
     
  • prost56 Info - west seneca, New York
    July 20, 2008 09:56 PM
    so what would be the best gun for the money??,,sharp?.binks?,etc....HVLP,
     
  • Crazyhorse Rod Shop Rides Info Website - bluff dale, Texas
    July 21, 2008 06:20 AM
    Crazyhorse Rod Shop
    iwata
     
  • boop coupe Rides Info - clarksville, Maryland
    July 21, 2008 09:18 AM
    boop coupe
    I am a DIY painter and used Carzyhorse's advise on the Iwata spray gun. I used the Iwata 300 HVLP gun from paradisetools.com. $300.00 + free shipping. Shoots very nice with 1.3 tip even for first time users. I had the inlet regulator set at 10-12lbs wide open. Best gun out there. Be sure to use a filter on your compressor and a deposible moisture collector at the gun. Also plan on having on hand what you need to keep the gun clean after use.
     
  • sellersrodshop Rides Info - old hickory, Tennessee
    July 21, 2008 03:17 PM
    sellersrodshop
    i would go with the iwata or sata. i'm using sata guns right now & love em'. have a guy thats gonna lend me the iwata to test & see how i like it. the thing you need to realize is these are precision instruments & you get what you pay for. the difference in these guns & the others is like comparing a set of reduced price cast wheels to the high dollar true billet wheels.
     
  • jsrodder Rides Info - aztec, New Mexico
    July 21, 2008 04:59 PM
    jsrodder
    I have used Iwata for several years now and love them. I think I have 6 of them now. Sata is a good gun but requires a much higher pressure to spray smooth even with the "HVLP"
     
  • Crazyhorse Rod Shop Rides Info Website - bluff dale, Texas
    July 21, 2008 05:07 PM
    Crazyhorse Rod Shop
    well it damn sure worked on your chevy
     
  • jsrodder Rides Info - aztec, New Mexico
    July 21, 2008 10:17 PM
    jsrodder
    Thanks Shine...................


    As Shine also knows, No matter what kind of gun you use, a nice show car paint job comes from how much time you spend color sanding and buffing. It can't be done quick. Patience is the key to any nice car.
     
  • prost56 Info - west seneca, New York
    July 30, 2008 08:46 PM
    what about delvilbiss??
     
  • Crazyhorse Rod Shop Rides Info Website - bluff dale, Texas
    July 31, 2008 08:50 AM
    Crazyhorse Rod Shop
    devilbiss has become a walmart product. cheap guns are just that. cheap. you can paint it with a roller and block it out but to spray a nice finish you must have a good gun. important fact about todays high solids. if you put a thick wet coat on it will wave or solvent pop thats why i got rid of all my old jgas and other guns.
     
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