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Not really an *airbrush* question (HVLP)

Discussion in 'Open Bar!' started by Neural, Jan 31, 2019.


  1. Neural

    Neural Gravity Guru

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    Looking for some info on working with a detail HVLP gun. Mostly want to know if the problems I'm having are fixable, or if it's just because "harbor freight quality".

    Attached is an image of the detail HVLP I use. Highlighted at the top in red is an area that I'm seeing a problem with leaking. There appears to be a seal inside the cap, but not sure if maybe it needs to be replaced? It's a bit of an O ring, but honestly looks like it's made of a substance other than the usual rubber. It's more of a paper pulp color.

    Highlighted at the bottom area in red is the adjustment that allows me to quickly change the amount of air going into the gun. It works fine, but, as the image indicates, it's pretty loose. Loose to the point that when using the gun and wearing gloves, I sometimes see a change in the pressure as the fabric on my pinky finger brushes up against it while moving. Is there anyway to make it a bit more stiff in it's motion?

    Thanks.

    detailhvlp2.jpg
  2. huskystafford

    huskystafford Needle chucking Ninja Very Likeable!

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  3. Neural

    Neural Gravity Guru

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    It's now attached. Been one of those days.
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  4. JackEb

    JackEb The Dragon Hunter Staff Member Admin

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    Image now made larger for those of us playing at home.
    I bought a cheapy pair, the larger one leaked like a sieve from the bottom of the cup it didn’t matter how much I tightened it, it’s now cleaned out waiting for me to tear it down, replace any seals I find and try again. I haven’t bothered trying the smaller one. I’ll keep the cheapies for gesso/base coats I think.
    Sometimes cheap is exactly that ... cheap
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  5. huskystafford

    huskystafford Needle chucking Ninja Very Likeable!

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    Many times lol
  6. jord001

    jord001 Air-Valve Autobot!

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    Personally I would try some ptfe tape round the threads. But only once round or so not loads

    Lee
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  7. Neural

    Neural Gravity Guru

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    That would probably work. Thanks :)
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  8. jord001

    jord001 Air-Valve Autobot!

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    Its a cheap fix if it works.

    Lee
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  9. huskystafford

    huskystafford Needle chucking Ninja Very Likeable!

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    I was just wondering... Would this work?
    https://www.air-craft.net/acatalog/Loctite-542-Thread-Sealant.html#SID=2016

    Loctite 542 liquid thread sealant is ideal for making air tight connections on threaded compressor, manifold & hose fittings. Simply apply the sealant to clean connector, fasten, align & allow to dry.

    Loctite 542 is particularly useful where alignment & adequate sealing with PTFE tape may be difficult, for items such as pressure gauges or regulators.

    * 10ml applicator bottle
  10. JohnnyChronic

    JohnnyChronic Young Tutorling

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    hey Neural, I have one that looks the same, there should be a black rubber o-ring around the base of the threads. I would have to have hands on to solve the air pressure adjustment screw problem but, I would take out the screw and bolt that seats into the grip for a better idea at the failure.
  11. Neural

    Neural Gravity Guru

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    Interesting. There is definitely *not* an O-ring on the one I have.

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