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Paint spray nozzle - how do I know which nozzle is which - external mix or internal mix?

My sprayer has two nozzles, one is for Internal mix pressure, and the other is for External mix pressure. How do I know which is which?

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Top one should be paint flow and the bottom one should be air flow. that is how my gun works anyway. Hope this helps you out. mine is a siphon type gun may be different for a gravity gun. Mike

Posted on Jan 06, 2009

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Where can you find the mixing ratio for the product being used?


you did not state what paint and what gun and what pressure - telepathy is overrated and works only in the movies...

if you use two pack mix - on the package is clearly stated how much part 'a" and how much part "b" should be used, you can then add up to 20% of thinners if allowed in particular paint.

you need to pay attention if mix is by weight or by volume, light paints are usually by volume,

paint should be rather light oil to water consistency in low pressure guns, if gun nozzle is below 0.8mm strainer must be used (190micron is ok) above that you can use your old pantyhose to strain paint after mixing.

hope this will help you at least a bit...

Oct 26, 2014 | 3M Mix Ratio Insert,pk100 - 3M

2 Answers

How much should I thin paint for pneumatc sprayer?


you did not mention what paint, you did not mention what sprayer.

remember, if you use solvent - opacity of the paint is sacrified, tints are less visible, metallic require more clear coverage.

for water based paints - except airbrush, usually no thinning is required, but you need to first stir it well (at least 3min on manual or 1min 30sec if mechanical stirer is used) strain it, i am using old stockings for that purpose in single layer, works very well for me and if nozzle is above 1.4mm up to 2.8mm there is no problem whatsoever. if this is splatter paint (nozzle 4.5mm or greater) do not even think about thinning it...

for acrylic - if nozzle is between 0.8mm and 2.8mm, procedure as above and you need to add specific thinner, usually up to 20% albeit in some cases up to 40% per volume) so paint will be about like ight cooking oil - water.

for oil paints and enamels - solvent should be not more than 20%, albeit you can increase it up to 40% in rare circumstances, if you are using hvlp gun, you can, if you yousing hp gun - no! it will disperse too much.

for two packs and urethanes - not more than 20% better keep between 5% and 10%

for latex - in rare circumstances you are allowed to use very, VERY specific solvent, and ususally not more than 10%, nozzle usually is 8mm or greater in these paints.

Oct 19, 2014 | Air Spray Guns

1 Answer

My 640 titan run but will not prime it does not spray product


It is hard to follow your question....however; if the sprayer turns on and the paint fails to enter the nozzle, you may have a blockage. Take the spray nozzle apart and run hot water over it to clean it out. You may need a small brush or cu-tip to clean the inside of the barrel. Blow though it and see if air passes easily. reassemble and run as you normally do. Be certain the top is attached to the paint reserve tightly and securely. Any air leaks will prevent the sprayer from building up pressure within and thus no spay will be emitted.

Dec 19, 2013 | Titan 440 Impact Airless Paint Sprayer...

2 Answers

I have the hds780rs0605 I need to know if I can use latex paint for my walls and how to with out it clogging up


Let me start by saying these types of paint sprayers are not usually recommended for painting large things like room walls because you're going to spend a lot of time refilling the paint cup. The cup only holds 20 ounces of paint and that won't go very far on your walls. If all your paint isn't mixed and properly thinned at the same time your walls could end up with a checker board look. You would usually be way further ahead to rent an airless paint sprayer.
If you have to use it; first run your paint through a paint strainer, avaliable at any paint or box store (The Home Deopt, Lowes, etc). Even new paint has impurities that will clog paint guns. It's highly recommended you mix in a paint conditioner like Flotrol but not absolutely necessary. Next, you're going to have to experiment with the consistency of the paint to get a good even flow out of the gun. The thinner you have to make the paint to get a good flow, the lighter and more coats you're going to have to apply. It's also recommended to run a paint soaked roller over the wall right after you spray it to even out the paint and remove any overlap marks.

Aug 05, 2012 | Air Spray Guns

1 Answer

Graco Magnum XR5 electric airless sprayer won't start


It could be something as simple as you have the pressure turned down so low it won't appear to be working try to turn the pressure up and see what happens.
The worst thing could be you did not clean the sprayer out properly and now the paint has dried and the shaft is frozen to the packings and the other internal parts of the your sprayer.

Jun 27, 2012 | GRACO INC Magnum XR5 232740 Paint Sprayer

1 Answer

Bought anCampbell Hausfeld airless paint sprayer,


no fluid gets to nozzle or comes from nozzle.
sounds like your fluid line is pluged or the gun is pluged at or before the tip

Dec 28, 2009 | Air Spray Guns

2 Answers

I bought a psh1 to spray latex as the reviews


Hi


What size is the jet?
What compressor pressure are you using, LOW is good >20PSI
You will need quite a large jet for latex paint even thinned. I have tried a 1.8mm jet and that still clogs!! Consult your local spray painter with what size jet you need.

I am betting the standard size of 1.5mm is way too small, that type of gun is fine with the correct jet size.

Aug 12, 2009 | Porter Cable Gravity Feed Paint Sprayer

1 Answer

Air is coming out but no primer


  1. primer viscosity to thick
  2. internal filter clogged
  3. internal passage clogged
  4. gun not adjusted properly
  5. high build primer uses more air pressure
  6. wrong needle and fluid nozzle
  7. gun needs cleaned

Aug 07, 2009 | Vaper 4 Piece Set 3 Gravity Spray Gun +...

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