10 308–718
Spray
T
echniques
Tip Selection Chart
Application Tip
Orifice
2
Air V
olume1
Fog 1/8” High
Simulated
Acoustic 3/16”
(fine, or small
confined areas)
1/4”
(fine to
medium)
5/16”
(coarse)
Medium to
High
Orange Peel
1/8” to 3/16”
Medium to
High
Splatter Coat
1/4 to 5/16”
Low to
Medium
Knockdown 5/16” Low
1
Control air volume with the gun air flow valve (424).
2
For more material volume, try a larger orifice tip.
Adjusting the System
Sufficient
fluid output (volume and pressure) and good
atomization requires testing to balance the compressor
air to the gun and pump and to select the right tip.
Keep in mind these important points when adjusting
the gun:
1.
Read all of pages 10 and 1
1 first.
2.
Refer to the chart above for tip selection. Consider
the size of aggregate in the material and the
coarseness of the spray pattern. Remember
, the
larger the tip, the heavier the pattern.
3.
The compressor provides air to both
the gun and
the pump; the more air you supply to the gun, the
less that is available for the pump.
4.
All spraying adjustments are made at the gun;
material pressure and flow rate is made by adjust
-
ing the regulator
.
5.
Start the sprayer with the gun air flow valve (424)
at its maximum setting (fully
+
). If needed, slowly
decrease the gun air flow until you get a good
spray pattern. Use the minimum amount of air at
the spray gun to achieve the proper spray pattern
and minimize bounce back.
6. T
urning the air flow valve (424) toward
(+)
increases air flow
through the gun which
decreases texture material output
.
7. T
urning the air flow valve (424) toward
(–) decreases air flow through the gun
which
increases pump output.
To Get Less Material
Try
any one or a combination of these methods.
1.
Screw in the gun fluid regulator knob (418).
2.
Use a smaller tip.
3.
Reduce pump pressure. Use the regulator
.
To Get More Material
Try
any one or a combination of these methods.
1. T
urn the air flow valve (424) to decrease (
–).
2.
Unscrew the fluid knob (418) to increase trigger
travel.
Note:
Maximum trigger travel occurs when trigger
bail (401) can hold trigger in open position. Fig. 1
1.
3.
Use a shorter hose.
4.
Use a thinner material mixture.
5. T
ry a larger orifice tip.
6.
Increase pump pressure. Use the regulator
.
CAUTION
T
urning the knob (418) out too far will remove the
knob and the gun will not shut of
f when the trigger is
released.
7. T
est the spray pattern on cardboard. Hold the gun
18 to 30 in. (457 to 762 mm) from the surface. Use
this spraying distance for most applications.
8.
Overlap each stroke 50% in a circular motion.
OUT
423
Fig. 11
418 IN
424
401
