Silverline Gravity Feed HVLP Spray Gun - Manual (Page 8)

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7
Gravity Feed HVLP Spray Gun
Adjust the spray pattern:
Note: Always readjust the material output when modifying the width or shape of the
spray beam.
1. Slowly turn the Pattern Adjustment Dial (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.
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
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• 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.
Maintenance
WARNING: Always disconnect from the air supply and depressurise before disassembling
or carrying out any maintenance.
WARNING: Always wear suitable protective equipment including eye and respiratory
protection, as well as gloves, when carrying out cleaning or maintenance procedures.
WARNING: The majority of solvents used for painting applications are toxic and highly
flammable. Comply with local laws and regulations with regards to handling, storage and
disposal of solvents and other harmful and potentially dangerous substances.
Note: Your spray gun is a fine precision instrument and must be treated and maintained
accordingly, in order to achieve consistent, professional-looking, uniform results.
• The most common problems with spray guns are caused by paint being allowed to dry
inside the tip, nozzle or internal air/fluid passages
• Clean the entire spray gun thoroughly after each project, and when changing the type
of material being sprayed
• Always use the same solvent for cleaning that was used to thin the paint
General cleaning after every use
1. Unscrew Paint Container Lid (1), empty remaining material into a suitable sealed
container, unscrew the Paint Container (2) from the spray gun and clean thoroughly
with the appropriate solvent and clean cloths
2. Pull the plastic filter element out of the spray gun body (it sits inside the paint
container connection) and clean thoroughly with solvent
3. Clean the nozzle assembly of the gun, lid and gasket of the paint container
4. Refit the filter element and paint container, fill with a small amount of solvent and
close the lid
5. Connect the gun to the air supply
6. Direct the gun towards an empty container and spray the solvent through the gun
into the container, until the spray is clear of any paint
7. Turn off the air supply and disconnect the gun
8. Open the paint container, empty remaining solvent into the disposal container, and
allow all components to dry thoroughly
WARNING: In order to prevent solvents and other harmful substances from entering
the atmosphere, open solvent cleaning is not permitted in some territories, and special
cleaning procedures apply (e.g. cleaning inside special closed bags and containers, etc.).
Make yourself familiar with local regulations, and apply the recommended procedures.
Special cleaning procedures for air and fluid nozzles and
needles
WARNING: All nozzles and needles are precision made. They must be handled with the
utmost care. Damage and alterations will cause decreased performance or faulty spray.
WARNING: Needles have sharp points. Handle with care to avoid puncture wounds and
other injuries.
1. Referring to the ‘Assembly Diagram’, carefully disassemble the spray gun, remove
the nozzle assembly and fluid needle
2. To clean, soak nozzles and needle in a suitable solvent that dissolves any dried
material and clean with a suitable soft brush
Note: Never soak the entire spray gun in solvent, as this will damage the packings and
remove lubrication.
3. Carefully blow all components clean with filtered, compressed air
WARNING: Do not probe any of the holes in the nozzles with metal instruments. If
mechanical cleaning becomes necessary, use only implements from materials softer than
brass, such as specialised nozzle cleaning aids.
Lubrication
• Even though the air and material passages of the spray gun must remain free of oil and
other contaminants, some components require frequent lubrication
• Slightly lubricate all packings, bearings and dynamic O-rings with a specialised spray
gun lube, and apply a small amount of petroleum jelly to springs
FIG. A
Coating will be
light at this point
Coating will be
heavy at this point
Correct
200 - 250mm
Wrong
Coating should be even
and wet when spraying
End of
Stroke
Release
trigger
Pull
trigger
Start
stroke
FIG. B
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