'LGT' Construction Diary

[ShinOBIWAN]

Bob, what do yo think of this unit on ebay:

http://cgi.ebay.co.uk/ICI-PROSPRAY-4...QQcmdZViewItem

Seems to be 4 stage with 9psi and ICI is a respected brand over here.

Alternatively:

http://cgi.ebay.co.uk/DEVILBISS-FINI...QQcmdZViewItem

A 3 stage 6psi DevilBiss which again is a respected manufacturer.

Rich, I'd look around on ebay mate. Stuff seems pretty cheap even the quality brands.

[richie00boy]

I did have a quick look on ebay, that was where I saw the Sealey one. Those units you found are out of my price range though. I don't need anything fancy, as long as it sprays car paint I'm happy. I've no need to spray glue or house paint.

[ShinOBIWAN]

Originally posted by richie00boy
I did have a quick look on ebay, that was where I saw the Sealey one. Those units you found are out of my price range though. I don't need anything fancy, as long as it sprays car paint I'm happy. I've no need to spray glue or house paint.

Rich, I just bought one of those ICI 4 stage jobs - impulse buy I'm not sure its any use but I'll be shifting my existing gun/air line and compressor cheaply if your interested.

[Bob Barkto]

One's dirty and one's clean!

Seriously tho, the spec's look more than good enough for any diy builder. Probably good enough for a shop too.

I know DeVilbiss and they make some of the finest guns I've ever touched but they don't seem to sell any turbine stuff over here.

Wasn't aware that ICI made tools. Over here they sell paint under the Glidden name.

Neither comes with the gun so.. just in case, it might be worth mentioning that turbine units need a turbine specific gun. Compressed air guns won't work at all with a turbine.

Originally posted by ShinOBIWAN
Bob, what do yo think of this unit on ebay:

...

[ShinOBIWAN]

Thanks Bob.

I went with the 4 stage ICI unit simply because I use a lot of high build primer and liked the idea of headroom. I've been meaning to upgrade from the starter kit I have now for some time.

The market seems to be flooded with HVLP, LVLP, RP guns. What are the differences between these?

Ideally I'd like to go with a two gun setup this time. One for clearcoat, metallics and base and another for primer. I guess that means a ~1.2mm tip and ~1.6mm setup?

The only thing I really know is avoid the cheap guns. Other than that I don't have much idea.

I was thinking about the Sharpe T1 Titanium as the clear/finishing gun:

http://www.sharpe1.com/sharpe/sharpe...iles/RMC2RMC3/$File/310585E.pdf?OpenElement

And this Sealey for the primer and thicker paint materials:

http://www.pvrdirect.co.uk/productIn...atref=HVLP-751

[Bob Barkto]

They're all terms for the way the cap atomizes in order to increase transfer efficiency and meet air quality standards. There are some other considerations like ability to be washed in a gun cleaning station, but that's usually only a concern for commercial use. Some localities may have regulations for personal use so be aware.

HVLP - High Volume Low Pressure, can be either a compressor driven or turbine driven gun. Air pressure at the tip ~10psi or less and transfer efficiency ~65% or greater. Compressor driven guns of this type usually need a serious compressor, lots of cfm's. There are a few exceptions however.

LVLP - Low Volume Low Pressure. Compressor driven guns. Use less air (cfm) than other guns while still being low pressure and high transfer efficiency. They don't atomize as well as others but can be ok, but slow, if your compressor is limited. Mostly used as detail or close quarter guns as overspray and bounce back are reduced.

RP - Reduced Pressure, another compressor driven gun type. Falls somewhere between HVLP and conventional. The tip pressure is limited to help meet standards while still maintaining the feel and operating character of a conventional compressed air gun. Higher transfer efficiency typically, but not always. Usually less overspray than conventional guns. Most consume slightly less air than HVLP.

Compliant Guns - See RP. These guns do meet certain regulations for transfer efficiency, pressure, etc.

Tip setup is tricky. Totally depends on the gun and material. I would strongly recommend checking with the gun and paint manufacturers for their advise.
But generaly, for automotive clears/base coats and maximum efficiency (speed of application) most guns would use a ~1.3 or 1.4 tip.
1.4 or 1.5 might be better for some base paints.
~1.8 for primer.
Metallics can be anyones guess! Particle size plays a big role and this varies widely from brand to brand.
Smaller detail guns would be happy with a 1.0 - 1.2 for most coatings.

Sharpe is very highly regarded. In your hands it would be more than good enough. Don't know the Sealey at all, sorry.

Originally posted by ShinOBIWAN
Thanks Bob.

I went with the 4 stage ICI unit simply because I use a lot of high build primer and liked the idea of headroom. I've been meaning to upgrade from the starter kit I have now for some time.

The market seems to be flooded with HVLP, LVLP, RP guns. What are the differences between these?

Ideally I'd like to go with a two gun setup this time. One for clearcoat, metallics and base and another for primer. I guess that means a ~1.2mm tip and ~1.6mm setup?

The only thing I really know is avoid the cheap guns. Other than that I don't have much idea.

I was thinking about the Sharpe T1 Titanium as the clear/finishing gun:

http://www.sharpe1.com/sharpe/sharpe...iles/RMC2RMC3/$File/310585E.pdf?OpenElement

And this Sealey for the primer and thicker paint materials:

http://www.pvrdirect.co.uk/productIn...atref=HVLP-751

[Idefixes]

Hi BOB,

What would be your recommandation for compressor to use a HPLV gun. I was thinking to by a 100Liter(22Guk-26,42Gus)/3HP compressor. It's rate to 10bars (145psi)max pressure, 240L/mn (8,5CFM) at 7bars (101psi) and 270L/mn (9,54CFM)at 3bars(43,5psi).



Thanks for advise.

Marc

[richie00boy]

If you note Bob's post above, you should see that compressors are not recommended for HVLP guns. This is because they have trouble getting the volume of air out. They are geared more towards higher pressure at lower volume flow.

Although the compressor you show there is fairly big, I'm not sure it would be ideal for HVLP.

[Idefixes]

Originally posted by richie00boy
If you note Bob's post above, you should see that compressors are not recommended for HVLP guns. This is because they have trouble getting the volume of air out. They are geared more towards higher pressure at lower volume flow.

Although the compressor you show there is fairly big, I'm not sure it would be ideal for HVLP.

I also play with HPLV turbine for house and wood painting job, there's great differences between those dedicated gun spray and ohter HPLV ones we can see who are seems to be dedicated to compressor : Exemple. If Bob could fixe that, it would be nice.

Marc

[Idefixes]

I look around ebay gunspray founded : in general they consumme 8-10CFM at 40-50psi, that ok for the compressor i mentioned over.

Marc