Silverline Gravity Feed Spray Gun - Manual (Page 9)

8
GB
Operation
Trigger operation
• The trigger has a 2-stage mechanism:
• Press to the first stage, the air will flow through the gun
• Press further and the paint is released
Note: Adjusting the Knurled Needle Adjustment Screw (4) will determine
how far the trigger can be depressed
Spray technique
• To achieve a smooth even coat the material must be prepared and
thinned in accordance to the manufacturer’s guidelines
• The gun must be clean and correctly loaded, the spray pattern adjusted
and the compressor set at the correct pressure
• Always carry out a test spray and follow the procedures described in
‘Adjusting the spray gun’, to establish the best settings
• Hold the spray gun approximately 200-250mm away from the workpiece
• Spray workpiece edges first. Overlap approximately 50% of each applied
spray beam
• Spray in continuous, even motion. Keep your hand as steady as possible
and move the spray in a straight pass across the workpiece (see Fig. B)
• Do not operate in an arc motion. Arcing will lead to an uneven finish
(see Fig. B)
• Avoid intensive waving, as it will cause the air jacket to become unstable,
allowing clouds of atomised spray material to escape
• Before spraying it is good practice to visualise the entire spraying
process. Start with the least visible areas and work towards the parts
that will be seen. This will create an even finish, allow you to identify
problematic areas of the workpiece, and let you work around spots that
may already have been covered
• After use, immediately disconnect the spray gun from the air supply
WARNING: Be aware that air tools may hold residual pressure after use.
Always bleed air pressure from the tool after shutting off air supply.
Adjusting the spray gun
• Bring the spray gun into the default position:
1. Carefully screw the Knurled Needle Adjustment Screw (4) clockwise
until it stops
WARNING: The paint needle can easily be damaged. Be careful not to use
too much force.
2. Carefully screw the Knurled Pattern Adjustment Screw (5) clockwise
until it stops
WARNING: DO NOT use too much force, as this may damage the valve seat.
3. Loosen the Air Nozzle Locking Ring (12) about a quarter turn, to allow
the Air Nozzle (11) to be adjusted
• Adjust the material output:
1. Connect the spray gun to the air supply
2. Direct the gun towards a large piece of cardboard or similar material
3. Hold the spray gun steady and depress the Trigger (9)
Note: In default position, there should be no material or air output.
4. Slowly turn the Knurled Needle Adjustment Screw (4) anticlockwise to
open the material flow
5. Adjust until the desired material output is reached
• Adjust the spray pattern:
Note: Always readjust the material output when modifying the width or
shape of the spray beam.
1. Slowly turn the Knurled Pattern Adjustment Screw (5) anticlockwise to
adjust the spray pattern. Turn until the desired spray pattern is reached
Note: Turning the pattern adjustment screw anticlockwise increases the
spread, turning it clockwise leads to a narrower, more circular spray pattern.
2. Turn the Air Nozzle (11) to adjust the orientation of the spray pattern
(see Fig. A)
3. Once you reached the desired spray pattern, release the Trigger (9)
and tighten the Air Nozzle Locking Ring (12) by hand, to lock the air
nozzle in place
Note: In most operations the wings on the air nozzle should be horizontal to
provide a vertical spray pattern which gives maximum coverage as the gun
is moved backwards and forwards parallel to the surface being painted.
FIG. A
Coating will be
light at this point
Start
stroke
Pull
trigger
Release
trigger
End of
Stroke
Coating will be
heavy at this point
Correct
Wrong
Coating should be even
and wet when spraying 200-250mm
Fig. B
783124_Z1MANPRO1.indd 8 04/07/2013 17:51