Paint sprayers

MrTube

MrTube

Well-known member
I've never used a paint sprayer. So i've got a lot to learn.

I'm setting up to spray with urethane paint. The compressor I can use is a sears and claims to be 5HP. I say claims because its a 120V compressor and anything over 2HP is impossible at 15A.

At any rate, its 20 gallon single stage. I'm not sure what kind of sprayer is best for this? It seems the HVLP guns are out of the question. Does this mean LVLP are the only alternative?

I'm looking to spend $50-100 on the gun. I assume i'll also need a moisture trap of some sort?
 
I agree with glens statement on urethane, however if you're only going to spend $50to$100 you can get decent equipment used in old school high pressure guns. A Binks 7 will spray everything from 2k primer to high solids 2part clear. The draw back is you'll use 1/2 again more material. Good equipment in good repair means even spray pattern and better finish.JMO
 
Harbor Freight sells an inexpensive HVLP gun that does an acceptable job with some practice. They also sell moisture traps.
 
MrTube said:
I've never used a paint sprayer. So i've got a lot to learn.

I'm setting up to spray with urethane paint. The compressor I can use is a sears and claims to be 5HP. I say claims because its a 120V compressor and anything over 2HP is impossible at 15A.

At any rate, its 20 gallon single stage. I'm not sure what kind of sprayer is best for this? It seems the HVLP guns are out of the question. Does this mean LVLP are the only alternative?

I'm looking to spend $50-100 on the gun. I assume i'll also need a moisture trap of some sort?
Click to expand...
you need a 30 amp breaker goodluk.
 
I sprayed a 52 ft yacht with that same compressor, hull & cabin & deck...no troubles.

1 coat epoxy primer
1 k200 2 part primer
Sanded everything(same compressor running DA sander)
1 more epoxy primer
2 coats polyurethane enamel
Devilbiss JGV spray gun.
2 water traps in series off compressor.
Started with a new comprerssor...it was pretty tired near the end.
10 days 100 hrs
I can't work like that anymore :eek:
 
Add a good respirator to your list, one that is safe to use with urethane paints. I believe urethane paint contains isocyanates which is very nasty.
 
At very least along with the good respirator, and good quality HLVP gun, obtain a proper fitting paint suit, tape around the cuffs to your boots, and use good quality rubber gloves.
Keep dust to a minimum somehow !
 
billwill said:
you need a 30 amp breaker goodluk.
Click to expand...

With 14Ga wire? I think a new circuit would be in order. Lessee 30amps? hhhmmmm that would require at least 10, maybe 8ga wire to handle the load. I'm sure there's a chart somewhere that would tell you.
15 A X 110 V = 1550 watts 30A X 110 V =3300 watts
Terry
 
Terry said:
With 14Ga wire? I think a new circuit would be in order. Lessee 30amps? hhhmmmm that would require at least 10, maybe 8ga wire to handle the load. I'm sure there's a chart somewhere that would tell you.
15 A X 110 V = 1550 watts 30A X 110 V =3300 watts
Terry
Click to expand...

I think you missed the point.

Sears rated the compressor as 5 HP. yet it draws 15A or less at 120V. My point was its obviously closer to 2HP if i'm lucky.

This is of course assuming 1HP is still 746W. :rolleyes:

For 30A I would recommend 8AWG. 10AWG seems kinda light for any distance.
 
If you use the conversion of 745 watts/ HP you can see that a 5HP you are over the 3300 watts required for a 30A 110V circuit. But the way motors are rated it is the stall HP and not continous so a 5HP could easily run on a 30A circuit. Get the largest HP compressor you can afford and get it wired in correctly. MHO. Have done some paint jobs with old type DeVbilss gun and got good results. Use a good respirator as the hardner is dangerous stuff.
 
The biggest concern you should have is self protection. You must not spray without a fresh air mask at a minimum. A full hood would be better. As it has been said, urethane is nasty stuff. Gar Williams
 
jrelliott said:
If you use the conversion of 745 watts/ HP you can see that a 5HP you are over the 3300 watts required for a 30A 110V circuit. But the way motors are rated it is the stall HP and not continous so a 5HP could easily run on a 30A circuit. Get the largest HP compressor you can afford and get it wired in correctly. MHO. Have done some paint jobs with old type DeVbilss gun and got good results. Use a good respirator as the hardner is dangerous stuff.
Click to expand...

I have a Sears 220v oil-less 2 cylinder compressor with a 30 or 40 gallon horizontal tank. It works fine spraying urethane/epoxy with the SATA 2000 professional HVLP gun I have and I use it to supply my fresh air mask at the same time.

The HVLP system doesn't use the volume of air the old high pressure guns used.
 
Your compressor should work OK. 5HP is pretty big for an electric motor on a 20 Gal compressor. Most are only 2 HP. I've got a 5 HP on an antique 60 gal compressor and it's huge. If you do a door then a fender and so on you can let the thing build pressure between objects. I still use an old syphon type Sharp model 75 to shoot Imron on helicopter parts but don't tell the EPA. They say to use 50 PSI but I've never shot over 45-psi yet. I have an HVLP bottom feed pressure cup type Sharp still new in the box. I guess I aught to get it out one of these days and start using it to save that expensive paint. I have to use a bottom feed or a pressure pot so I can paint the bottom side of things to big to turn over like belly skins and the bottoms of mounted booms & stablilizers. On a car you can use a top feed gun near all the time. Upside down they don't work too good.

Kerby
 
My current project is going to be a vintage refrigerator with probably 1 to 2 quarts of paint.

It sounds like the compressor I have is going to work fine for that.

When you say fresh air mask, do you mean one piped to the outside? Or just a respirator with filters?
 
Fresh air mask has a fresh air supplied under pressure to your mask/face shield from a clean air source. You may be ok to use a good respirator with a organic filter and with good air circulation. I would do your own research to be safe.
 
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mrtexas said:
I have a Sears 220v oil-less 2 cylinder compressor with a 30 or 40 gallon horizontal tank. It works fine spraying urethane/epoxy with the SATA 2000 professional HVLP gun I have and I use it to supply my fresh air mask at the same time.
Click to expand...

Hi mrtexas, do you have fresh air supply for your compressor or is the compressor in a different area from where your are painting? Or do you have a good filter for your air supply to your fresh air mask?

I don't have a fresh air mask yet but I bought a used diaphragm compressor I thought I could use for a mask, hopefully it can deliver enough CFM to breath:eek:
 
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