H.E.R.O. H2K 3819 Owner's Manual - page 7
Owner’s Manual
HK3819 / HK5523
Page 7
AIRLESS SPRAY PAINTING SUGGESTIONS
Poor Good Tailing Good Pattern Fog, Overspray
FIG. 1
A good airless spray application is the result of many factors. Surface preparation, which includes cleaning and
degreasing, priming, material compatibility, quality finish product and correct application technique. All are all important to
the finished results.
The key to all good applications is a good spray gun technique. Proper application techniques can easily be learned by
using the following simple guidelines. If you are not familiar with the basic spray techniques we recommend that you
study this portion of the manual and practice the techniques shown. Practice your technique on scrap cardboard or old
newspaper until you feel confident.
FOR EXCELLENT RESULTS, READ AND PRACTICE THESE TECHNIQUES
1.
Always strain all paint through a H.E.R.O. strainer bag. The most common reason for airless sprayer’s to
malfunction is foreign matter jamming the valves or plugging the tip. Always strain the paint before putting through
the pump.
2.
Always spray at the lowest pressure setting which will provide a uniform spray fan( fig. 1 ). Adjust pressure
control knob so that paint is completely atomized. Insufficient pressure will result in "tailing". Too much pressure will
result in excess fog and over spray, excess tip wear, and increased sprayer wear and tear. See setting up to spray,
page 8.
3.
Always spray at right angles to the surface being sprayed ( fig. 2 ). Angling or arcing the nozzle toward the
surface will cause uneven coverage and excessive over spray.
4.
Always hold spray gun 11-12 inches from spray surface( fig. 3 ). Too close and the fan width will be reduced
and material will be applied too heavily (runs). Too far from the surface and you will have excessive over spray and
light coverage (transparent).
5.
Always move the gun parallel to the surface being sprayed, at a consistent speed. This avoids uneven
coverage.
6.
Always start the spray stroke before triggering the gun and release the trigger before completing the stroke
( fig. 4 ).This avoids heavy build up of paint at either end of the spray stroke.
7.
Always lap your spray pattern by one half( fig. 5 ). This assures full coverage of the surface being painted.