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Warning
Always relieve the pressure from the spray gun after work is completed. The
pressurized lines may rupture and persons standing nearby may be injured by the
escaping material.
Note
The gun must be flushed before use to prevent contamination of the spraying
material.
6
Spray pattern adjustments
You can change the spray pattern on the PILOT PREMIUM by making the following
settings.
Material
connection
Adjust the material pressure:
Material connection:
You can adjust the material pressure only on the pump or the pressure tank. Please
follow the directions and safety instructions of the manufacturer.
Adjusting wide or round spray:
The regulating screw is used to regulate the
spraying width. By turning it to the left
(unscrewing), the spray becomes wide, by
turning it to the right (screwing down) it
becomes round.
Adjusting the material flow volume:
The material volume can be regulated by
turning the adjusting screw in or out. The
material volume is increased by turning it to
the left (unscrewing) and reduced by turning
it to the right (screwing down).
Adjusting the air volume:
The spray air volume can be regulated by
turning the adjusting screw in or out.
Air connection
36
6.1
Correcting spray pattern flaws
The following table shows the settings you can use to change the spray pattern.
Spray pattern test
Deviation
Spray pattern is split in
the centre
Spray pattern is too thick
at the ends
The spray pattern shows
rather large droplets
Material application in
the centre of the spray
pattern is very thin
Spray pattern is split in
the centre
Spray pattern is very
spherical
7
Troubleshooting and fault rectification
Warning
Before each change-over depressurize the spray air as well as the material supply
to the spray gun - risk of injury.
Fault
Cause
Material needle or nozzle dirty or
damaged
Gun drips
Spring cap (item 13) turned too
far back
insufficient material in the materi-
al container
Cup is tilted too much during the
spraying process
Pulsating or
shimming spray
Material nozzle loose or damaged
beam
The material is too heavy for the
suction supply
Gun emits spray
Valve spring (item 25) or valve
in idle position
cone (item 24) damaged
37
desired spray result
Required adjustment
• setting a wider spray pattern
• Setting a more rounded
spray pattern
• Increase the nozzle air pres-
sure
• Decrease the nozzle air
pressure
• Increase the nozzle diameter
• Reduce nozzle air pressure
• Increase material pressure
• Reduce material pressure
• Increase nozzle air pressure
Remedy
• Clean or replace
• Slightly turn down the
adjustment screw (clock-
wise)
• Refill the material
• Hold straighter
• Tighten, if necessary,
replace air distributor
ring (item 5)
• Use pressure tank or
pump system for delivery
• replace
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