Published on September 7th, 2012 | by Grant Barnard19
What Spray Tip Size To Use
This article will tell you how to pick what spray tip size for your airless sprayer. If you don’t know whether to Spray Or To Brush and Roll Click Here. Grants Painting is an Indianapolis Painter that serves the entire Indianapolis metro area and operates this free how to blog.
Rules of thumb
- The first thing to keep in mind is that the less pressure that you have to use – the less over spray you will get. So you will want to use the least amount of pressure as possible to get the results you want. Smaller tips require less pressure to atomize the paint.
- Use only reversible tips and always use the filters that go in the sprayer and use the one
- There are some products that help to reduce the viscosity of the paint and help it spray better. These products should be used very conservatively.
The tip size number system works the same with most manufactures. You see numbers like 213 515 717. The first number in the set of three numbers is the spray pattern size. It is half of the spray pattern height. So if it is a 5 then the pattern will be 10 inches tall when sprayed at the correct distance from the surface. The second two numbers in the set of three is the orifice size. A 13 or 15 or 17 is actually .013 in or .015 inches. The orifice size will be a factor in controlling the amount of paint coming out of the gun
What The Tip Size Chart Doesn’t Tell You
The tip size chart is very useful in deciding a tip size. You should gather that the orifice size lets much more paint through when size goes up just one number. The amount of paint that comes through is very much dependent of the power of the pump and the viscosity of the paint. So you must know that there is a HUGE difference between a 211 and a 213 or a 413 and a 415. The thing to consider is really the speed that the paint is being applied to the surface. A 211 will apply the paint about the same as a 413 or 513, it’s just the fan pattern will be double the size. And a 211 will put out paint much slower and with a nicer finish than a 213.
The Correct Spray Tip Size For Spraying Trim or Gutterwork
Spraying trim and gutter-work can be very difficult. Spraying either a shiny surface or anything metal with the correct tip is imperative. These are two surfaces that will show any drips or heavy spots like a sore thumb. So use a very small tip like a 211, 213, 311, or 313. Since gutter-work or trim will have many 4 in or 6 in areas the 2.. or 3.. sized tips work the best. To prevent runs, sags, or other defects restrict the flow with a small orifice size like the 11 or 13. Beginners should stick with the 11 sized tips on surfaces that will not be back-rolled. Use of a filter will need to be used or the smaller tip will clog so much it wont be worth it to use a sprayer. Use at least a 100 mesh in the gun and sprayer when spraying with a small orifice size tip.
The Correct Spray Tip Size For Spraying Interior Walls
Spraying interior walls should only be done if all items can be masked. It is best done in a basement or garage. Generally a 513 or 515 will do a nice job. Larger sized can be used especially if it is being back-rolled or is on a rough surface that doesn’t need to be back-rolled. Use the tip size that can be controlled by the operator. Getting the paint on faster is no help if you have to scrub over-spray off of everything.
The Correct Spray Tip Size For Spraying Siding And Exterior Walls
Siding will always need to be back-rolled. As long as everything is covered well you can use a larger tip size like 515 to 617. Near windows, screens or near surfaces that will catch over-spray downgrade to a smaller tip like a 513 or 413. You can even switch to the smaller 211 tip that you used on the gutters.
The Correct Spray Tip Size For Spraying Cement Block
Spraying cement block is very easy. Simply use the largest tip that you can spray effectively. Remember that you still should stick to the size below the maximum rated tip size.
Caring For Your Spray Tips – Spray Tip Maintenance.
Always keep the spray tips very clean. It can be very hard to do this especially if you are switching between tips. We use a small can of denatured alcohol to drop the tips when not in use. This will keep the spray tips clean and give the best finish. However this will also wear down the paint that marks the size of the tip so make sure either the numbers are on raised lettering so they still can be read after the white numbers are gone.