26
27
Attention
The material pressure may not be set higher than 6 bar. The air pressure may not
exceed 6 bar.
Warning
Always relieve the pressure from the spray gun after work is completed. The pressu-
rized 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 TWIN by making the following set-
tings:
Setting the material flow rate:
The material output depends on the size of the
nozzle installed - and may also be controlled by
way of adjusting the needle adjustment screw
(Item 14).
Adjusting the spray jet:
The spray jet is controlled by replacing or removing the air distribution ring (Item 2). There are
three possibilities:
Air connection
Adjusting the atomising air low rate:
The atomising air flow rate can be adjusted by
the air pressure reducing valve in the plant.
Material connection
1.
no air distribution ring
(Spraying angle approx. 60°)
= large wide jet
2.
air distribution ring without hole
= round jet
3.
4-hole air distribution ring
(Spraying angle approx. 30°)
= medium wide jet
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 pres-
sure
Material application in the
centre of the spray pattern
is very thin
• Decrease the nozzle air pres-
sure
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
Retooling and repairs
If a jet contour other than already described is desired, the spray gun has to be
retooled. The suitable material air control head, material nozzle and needle-combina-
tion form together a unit - the nozzle set. Always change the complete insert assm-
bly to maintain the desired finish quality.
Warning
Prior to any retools or replairs: Make sure that the spray gun is in depressurized con-
dition, i.e. all air inputs must be shut off - if not, imminent Risk of Injury.
Note
In order to perform the following procedures, please refer to the exploded diagram in
the beginning of these operating instructions.
7.1
Replacement of the material nozzle and the air cap
1. Remove the air cap (Item 1) from the gun body (item 6).
2. Pull the air distribution ring (Item 2) off the material nozzle.
3. Remove the material nozzle (Item 3) from the gun body; using a Size 9 wrench.
Reassemble in reverse order.
desired spray result
Summary of Contents for PILOT TWIN
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