Author Topic: Airless vs Air Assisted vs HVLP  (Read 664 times)

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Offline scholar

  • Posts: 103
Airless vs Air Assisted vs HVLP
« on: April 06, 2018, 10:15 AM »

I am a hobbyist/enthusiast, not a pro, but I like to have the right gear for the job.  I have got into spraying as vastly preferable to hand painting or paint rolling. 

I have a Fuji Q4 HVLP set up that I have used a lot.  I have various accessories for it - the ones I use most are the 3M PPS mini cups that I use for small jobs and a 2.5l stainless steel pressure pot that I use for larger jobs.

I also have a Graco ST Max II 495 Airless sprayer - I have not used this much (as I am behind on decorating), but I have used it successfully for painting walls.

Technology has continued to move on and there seems to be a much wider acceptance of Air Assisted spraying (I know it is not that new).  I am thinking about whether I should convert my Airless sprayer to use an Air Assisted spraygun.

So some key questions I am pondering on are:

- what do I need to convert to Air Assisted?
       AA gun (see below)
       Compressor (I have this)
       Air cleaner and regulator
       Air hose to gun
       Fluid hose to gun (see below)

- re the gun, does anyone have experience and recommendations?  I have been looking at the Graco G40 gun for starters; this comes in two versions, flat tip and RAC tip (not sure if the RAC tip would be interchangeable with the one on my existing Graco contractor style gun)

- re the fluid hose, the existing one on the Airless sprayer is 1/4” with a beefy pick up hose, all of which takes quite a volume of paint before you get to spray anything.  The AA setups I have seen have 1/8” fluid hose, so presumably it would be better with one of these?  Would I need to exchange the pick up assembly?

- if I do this, I could use the Graco in Airless or AAA mode, so would I still want to have the Fuji? (I think that the cleanup of the HVLP is much less hassle than for the Airless, so I imagine for small jobs, the HVLP would still be useful).

Any actual experience and insight would be much appreciated.

Cheers
« Last Edit: April 06, 2018, 10:20 AM by scholar »

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Offline Getmaverick

  • Posts: 115
Re: Airless vs Air Assisted vs HVLP
« Reply #1 on: April 06, 2018, 12:03 PM »
I actually just did this in my shop. You can order the G40 with the flat tip assembly and its actually cheaper. Flat tips are the way to go. I got my gun and 2 tips for a little over 700.00. I ordered this kit https://www.amazon.com/gp/product/B00OJX6CJ2/ref=oh_aui_detailpage_o06_s01?ie=UTF8&psc=1 and it works just fine.
Get you 25' 1/4 air and fluid hose. Been using this for several projects now and glad I invested in it.

Offline Ves

  • Posts: 35
Re: Airless vs Air Assisted vs HVLP
« Reply #2 on: April 06, 2018, 12:12 PM »
Titan cap spray. Use Titan FF tips then you can adjust your fan width from the gun. Great benefits of air assisted. HVLP finish, but a lot faster like airless

Edit: if you have IG dm me and I’ll point you in the rite direction for reference
« Last Edit: April 06, 2018, 12:15 PM by Ves »

Offline Getmaverick

  • Posts: 115
Re: Airless vs Air Assisted vs HVLP
« Reply #3 on: April 06, 2018, 12:22 PM »
Air assisted is a "little" slower than airless, but your using half the paint.

Offline Michael Kellough

  • Posts: 3255
Re: Airless vs Air Assisted vs HVLP
« Reply #4 on: April 06, 2018, 12:24 PM »
Titan cap spray. Use Titan FF tips then you can adjust your fan width from the gun. Great benefits of air assisted. HVLP finish, but a lot faster like airless

Edit: if you have IG dm me and I’ll point you in the rite direction for reference

@ Ves  not sure the last line means but if you are suggesting that the op get info from you offline please reconsider so everyone can benefit from your advice.

Offline Ves

  • Posts: 35
Re: Airless vs Air Assisted vs HVLP
« Reply #5 on: April 06, 2018, 12:40 PM »
Titan cap spray. Use Titan FF tips then you can adjust your fan width from the gun. Great benefits of air assisted. HVLP finish, but a lot faster like airless

Edit: if you have IG dm me and I’ll point you in the rite direction for reference

@ Ves  not sure the last line means but if you are suggesting that the op get info from you offline please reconsider so everyone can benefit from your advice.

I was going to show him someone else’s set up and the work so the op can get an idea. I don’t personally own an air assisted but I’ve done a lot of research and hope to own on in near future.

Offline jmbfestool

  • Posts: 6591
Re: Airless vs Air Assisted vs HVLP
« Reply #6 on: April 06, 2018, 02:03 PM »
Regarding AA gun I would recommend Wagner 4700AC

Mainly because it uses large filter compared to others AND even though it’s a flat tip it’s reversible still so if you get a blockage you can quickly unblock it.   This is what sold it me and it’s a brilliant spray gun. 


Having smaller fluid hose and shorter hose is brilliant for clean up and saving on paint.

But

Reducing the hose size reduces amount stored pressure if that makes sense this is also true with a shorter hose this added with a graco 495 can generate heavy pulsing because it’s a piston pump which causes pulsing but the hose can make it worse or better.

Using a flexible, longer and larger hose can  reduce the pulsing a not sure on the technical side but I found it must be because like I said before you have more stored pressure and it gives the piston pump more time.    You will never stop it completely because that’s the nature of the beast when using piston pumps

You will have to buy a diaphragm pump to eliminate pulsing.

I converted my 490 to AAA



 
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