Question about DeVilbiss Gti-620g Millennium Hvlp Auto Paint Spray Gun

1 Answer

I have a GTI millinem gravity feed hvlp gun. It is new. I ran some solvent through it to see if it was functioning properly before using it to paint. The gun pulses every 1-3 seconds. I made sure everything was tight including the packing nut. The pulsing persists. Doesn't matter the air pressure or fan size. This is a BIG deal as I have a paint booth rented for the next 2 days.

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Master
  • 2,527 Answers

Check the packing nut on the trigger where the neddle valve slides through the trigger a bad seal there will make this happen

Posted on Apr 06, 2011

  • JOHN LAPIER Apr 06, 2011

    Also if the gun is brand new it could be the thinner is to thin to seal this seal and the paint may so test it with paint



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

How do you take this hvlp gun apart for proper cleaning of the spray gun?

I've found over the years the least amount of times you can tear a spray gun completely apart the better. Usually a real good 'flushing' with lacquer thinner will suffice. I will take the air cap off and let it soak in thinner to dislodge any build up but other than that, I simply run thinner thru till it runs clear out the tip.

I also 'back flush' which involves having thinner in the cup and the air supply hose attached. the air pressure should be adjusted quite a bit lower than what you use for spraying paint.

Then you place a clean shop towel or rag over the air cap of the gun and pull the trigger. This forces air back into the paint cup 'back flushing' the gun. Then take the rag away from the cap and pull the trigger again to run thinner thru the gun the normal way.

IF you still want to tear the gun apart for cleaning you can hopefully get some idea with this video link;

Quick Easy Way to Clean HVLP Spray Gun

Hope this helps.

May 25, 2015 | HVLP Air Tools & Compressors

1 Answer

Air bubbling up in cup when air trigger is pulled this is a gravity fed hvlp spray gun

it means the air holes in the nozzle are blocked the air couldn't get out in the front so instead it went back to the cup makes it bubble

Aug 20, 2011 | Campbell Hausfeld Husky Gravity Feed HVLP...

2 Answers

Can i use this spay gun to spray down bed lineing or is it caapable to do it???

Not likely

The tip will be too small for
bed liner material

Check the specs on the product
you want to use

May 23, 2011 | Campbell Hausfeld Husky Gravity Feed HVLP...

1 Answer

Cant seem to get a fan out of it. just a round spray pattern. any suggestions thanks

Have you checked the fan control adjusted is moving ? (the top knob) some had a habit of sheering off or threads stripping.

If it is OK then you have no air going to the air cap horns, possibly the baffle, The bit teh fluid tip holds in or paint in the air ways.

Mar 09, 2011 | GTI Millenium Hvlp Gravity Feed Spray Gun

1 Answer

Unit does not draw from bottom cup

Both are gravity type spray guns, i.e. they cannot draw from a bottom (suction, siphon) cup.

Jul 25, 2010 | HVLP 2 DeVILBISS Auto Paint SPRAY GUNS...

1 Answer

What are the controls of a gravity fee spray gun

most spray guns are basically the same gravity feed is no different, air pressure into gun and out nozzle,spray pattern fan to spot and last the amount of fluid comin out of cup to the nozzle.

Aug 28, 2009 | Ingersoll Rand 1.4MM HVLP GRAV FEED SPRAY...

1 Answer


It depends on the air cap\tip you are shooting with. For instance the 110 air cap is a standard compliant style. Were as the 105 and 115 are a HVLP style.

Aug 06, 2009 | GTI Millenium Hvlp Gravity Feed Spray Gun

1 Answer


buy a new gun, parts wil cost as much as a new gun, beside having to hunt forever for parts( all most impossable to find!)

Aug 05, 2009 | Ingersoll Rand HVLP Gravity Feed Spray...

Not finding what you are looking for?
DeVilbiss Gti-620g Millennium Hvlp Auto Paint Spray Gun Logo

198 people viewed this question

Ask a Question

Usually answered in minutes!

Top DeVilbiss Air Tools & Compressors Experts


Level 3 Expert

2527 Answers

ray gallant

Level 3 Expert

52126 Answers

Lawrence Oravetz

Level 3 Expert

10291 Answers

Are you a DeVilbiss Air Tool and Compressor Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides