34
35
Warning
Always relieve the pressure from the spray gun after work is completed. The pres-
surized 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 follow-
ing settings.
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.
Material
connection
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
6.1
Correcting spray pattern flaws
The following table shows the settings you can use to change the spray pattern.
Spray pattern test
Deviation
Required adjustment
Spray pattern is split in
the centre
• setting a wider spray pattern
Spray pattern is too thick
at the ends
• Setting a more rounded
spray pattern
The spray pattern shows
rather large droplets
•
In
crease the nozzle air
pressure
Material application in
the centre of the spray
pattern is very thin
• Decrease the nozzle air
pressure
Spray pattern is split in
the centre
• Increase the nozzle diameter
• Reduce nozzle air pressure
• Increase material pressure
Spray pattern is very
spherical
• Reduce material pressure
• Increase nozzle air pressure
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
Remedy
Gun drips
Material needle or nozzle dirty or
damaged
Spring cap (item 13) turned too far
back
• Clean or replace
• Slightly turn down the
adjustment screw (clock-
wise)
Pulsating or
shimming spray
beam
insufficient material in the material
container
Cup is tilted too much during the
spraying process
Material nozzle loose or damaged
The material is too heavy for the
suction supply
• Refill the material
• Hold straighter
• Tighten, if necessary,
replace air distributor
ring (item 5)
• Use pressure tank or
pump system for delivery
Gun emits spray
in idle position
Valve spring (item 25) or valve
cone (item 24) damaged
• replace
desired spray result