Got two airbrushes, one Iwata other old Hansa. And they both do the same thing, spitting. Hansa does it more then Iwata. At first thought it was a paint so tested the same thing wit hwater and it's stil spitting. So used different PSI, didn't help.
Cleaned both airbrushed in and out and they where dirty but after cleaning they where still spitting.
Using compressor with a tank and got a regulator with a filter on it.

Do not understand what is the problem.

Do they spit if you dry shoot them - no paint or anything. If so the problem is most likely with moisture un the iar line. The trap on the outlet only stops actual water - not water vapour, so if this condenses in the air line it has only one way out - and that causes spitting. You can try to see if you can get an in line moisture trap to fit close to the air brush.

HTH

Andy

Just tried that no paint or anything, just air. And it's ok. THe air flow is constant.

When I said it was spitting what I was talking that it's not constant flow of paint/water.

Is your paint thouroghly mixed? - if that don't help gonna have to leave it to someone with more knowledge that me to sort out.

Does it spit using just plain water?, if not then its your paint.

with water also

Dojo

Are you sure that it is spotlessly clean? Also has the needle been damaged(bent) at all?

HTH

Andy

The only time ive ever had an airbrush spit is when there was some minor damage to the tip of the needle which i managed to straighten. Also if the crown of the airbrush is damage this can also cause the airbrush to splutter.

I can only think of two possibilities: -

1. The airbrushis clogged; or
2. The airbrush needle tip is damaged.

Dojo, bought my Hansa Aero-pro 200 on Ebay. As it hadn’t been used in a few years, I cleaned it first, on start-up it was spitting and spluttering. Found this excellent “Airbrush Cleaning Pictorial” at IPMS Stockholm. All it needed was a thorough cleaning.


From the above experience, I built up a small list of probable causes, for Airbrush spitting:

Airbrush Dirty
Incorrect air supply (air pressure too low or moisture in air line)
Problematic needle (Dirty or Damaged)
Problematic Tip/nozzle (Dirty or Damaged)


If you have cleaned both airbrushes thoroughly, then look at a common denominator, namely:

Air supply.
But as you have mentioned spraying water and/or water-based (acrylic) paints, I’d check using a quite strong magnifying glass for pitting on the needle and/or tip/nozzle.

Hope this helps.

THank you every one for your help.
Checkiong the airbrush again and cleaning it. As maybe you are right and it's not that clean.
Will get back to you on what happened.