Machines - Spray Guns and Tips
Note: these archives were compiled from past Parking Lot Planet Forums. The answers and opinions are those of the posters. Things may have changed since then, so be sure to get up to date information from the current Parking Lot Planet forum
SPRAY TIP SIZE?
From: NV (NIGHTVISIONS)
Date: 12/16/00 10:11:55 AM
How do I pick what size tips I will need to keep? I mainly plan on using LATEX but might try, and then switch to OIL or ALKYD. I plan on using 2 machines to start one stenciling, do I need to use different tips?
Date: 12/16/00 10:03:21 PM
It all depends on how much paint you want to apply, some guys use 317 or 319, because of my lazyliner I only use 321 or 323 no matter oil or latex is doesn’t matter to me. Even if I was walk the machine I still would never use a 317.
From: Robert Liles
Date: 12/17/00 5:46:59 AM
start out with a 4-17, it will do it all. But you don't need 2 machines if your starting out. With an airless you can change from white to another color in 5 min and cleanout and change color in 10 min. Once you get the hang of it. This time of the year, latex takes too long to dry. Start out with alkyd or C.R. Good luck.
Date: 12/18/00 5:44:25 PM
Once again, here are my tip size recommendations:
217 - Sport courts, detail or fine stenciling 319 - 4" lines on concrete or seal-coat, 8" and 12" stencils (one pass) 321 - 4" lines on new asphalt 421 - 6" lines 621 - 8" lines 721/23 - 10" to 12" lines
I pass these on as rule of thumb. You'll come to find your own preferences.
From: THE MICK
Date: 12/21/00 8:22:46 PM
ARE YOU USING A YELLOW 317 THAT IS DESIGNED TO PAINT 4 INCH TRAFFIC LINES OR A STANDARD 317 THAT SHOULD PAINT 6 INCH LINES WHEN MOUNTED AT THE PROPER HEIGHT? IF YOU DON'T UNDERSTAND THE DIFFERENCE CALL RAE PRODUCTS AT 1-800-397-1984 AND ORDER A YELLOW 317 TIP AND I THINK IT WILL WORK FOR YOU NO MATTER WHETHER YOU ARE PAINTING LATEX, CHLORINATED OR ALKYD. GOOD LUCK.
Supposed to have 3 inch line
Date: 12/17/00 8:04:57 PM
Can't figure out why my Lazerline striping machine is spraying out a 5-6 inch line when I'm using the 317 tip. I cannot move the tip any closer to the pavement. Anyone know what's up?
Date: 12/18/00 10:45:49 AM
How thin is your paint. If it is like water, you will get a wide line no matter tip you use. Also, as others said change the tip and see what happens.
Date: 12/18/00 11:52:40 AM
You may be able to flip over the "no tools" black adjustment bracket which will position the horizontal bar maybe 1 - 2 inches closer(the bar that the gun is mounted on). Other than that, I'm with jim that the paint may be reduced or just be too thin. I'm guessing its solvent based paint? If you have another tip 3XX tip, see if it sprays the same wider pattern. If it doesn't you may have a bad tip.
Date: 12/18/00 5:32:12 PM
First thing to try: plug in another tip of the same size. Is the line width different now? I have come to find that, although labeled the same size, spray patterns will vary from tip to tip. The machining process used to make the tips is apparently not as uniform as it could be. Every once in a while you'll get what I call a "rogue" tip that doesn't spray the pattern you're expecting, straight from the package. I've purchased tips that have sprayed much wider or narrower than expected. Earlier this year, I opened up a new 321 whose paint output was more like a 317. Think I still have a 421 that sprays more like a 619. =P At any rate, this is a possibility. If this is the case, you should be able to return the tip to the place of purchase, for refund or exchange, should you decide it doesn't suit your needs.
Date: 12/19/00 12:23:03 PM
In thinking of your subject line and if you are looking for a 3 inch line, and are using a 317 tip. I use a 115 tip to get a 2 inch line and spray at a slower rate to get the coverage that I want. I use 219 to get a 4 inch line or smaller.
Date: 12/25/00 2:18:41 PM
This is the way that airless tips work. The first number of the tip indicates the line width. You must double the first number to know what width it is intended for. example 317 is for a six inch line a 217 is for a four inch line. The second two numbers indicate the size of the orifice or opening. the larger the number the more paint it will put down.Example, a 317 tip is for a six inch line with a light film coating, a 321 is six inch tip with a heavier film coating and a 329 would be a six inch tip with a heavy coating.
Date: 12/25/00 11:30:03 PM
You're close Bubba.......That's what most stripers think about the first number......but in truth the first number stands for the angle of pattern spray in tens of degrees....a 319 is a 30 degree pattern.....a 419 is a 40 degree pattern and a 621 is a 60 degree pattern with a 0.019 orifice.....
Date: 12/25/00 11:33:21 PM
oops..........that 621 was a 60 degree pattern with a 0.021 orifice
New Graco 3000
Date: 4/11/00 1:22:08 PM
I have a new Graco 3000 will be here tomorrow (I hope) and I need to be painting with it by Saturday,(big lot to do). Seeing as how I am a old "air head" and have never used a airless before, Can any of you give me advice on tip size and pressure to start with?
Date: 4/11/00 1:52:53 PM
tip size for new asphalt 219, for restripe 217 will work fine. Pressure should be turned slightly under half and check line for crispness. Add Pressure if needed. Good Luck
Date: 4/14/00 6:40:57 PM
Not trying to start a debate, but would like to amend the suggestions for tip size. I prefer a 319 for restripe, sealcoat, and concrete; and a 321 for new asphalt.
Date: 4/14/00 7:16:12 PM
If you have never striped airlessly before start with a smaller flow rate tip say a 317 until you feel completely comfortable with the machine. Then move up to a 319 and possible at some point up to a 321 for the fastest production. Lately I have had very good success using 419 and 421 tips for 4" lines when using very viscous, fastest dry waterborne paints (I do not need as much pressure to spread the line out). As far as pressure settings, gradually turn it up until the line quality improves. Solvent based paint should require 1/2 to 2/3 pressure and waterborne should be set in the 2/3 to full pressure.