5 Operational
Handling
5.1 Safety
Warnings
Make sure the following safety warnings are met to taking this spray gun into
operation.
• Remove all pressures from the gun and the system whenever operations are inter-
rupted.
• Make sure to wear proper respiratory protection masks and protective overalls whe-
neveryou are operating this spray gun.
• Air-borne particles represent a health hazard.
• Make sure to wear suitable hearing protectors. Spray guns produce sound levels of
up to about 82 dB (A).
• Make sure your working area is absolutely free from open fires and naked lights -
risk of fire and explosion.
5.2
Starting/Stopping Requirements
When taking the spray gun into operation, flush the gun with a solvent compatible
with the medium last used.
Warning
Make sure that all pressures are removed from the gun and the system before retoo-
ling - risk of injury.
Make sure you have the right material pressure at the gun before you start with your
job.
Warning
The material pressure shall never be set to a rating in excess of:
- 120 bar
The control air pressure shall not exceed 8 bar as, otherwise, the functional reliability
of the spray gun will suffer.
Warning
The spray gun and the system must always be relieved of all pressures whenever
work is terminated - lines left in pressurized condition could burst, with their contents
likely to injure anybody present nearby.
5.3
Spray Pattern Test
Spray pattern tests should be performed whenever:
• the spray gun is taken into operation for the first time
• the spraying medium is changed
• the spray gun was taken apart for servicing or repairs
The spray pattern is best tested using a workpiece sample, a sheet of metal, card-
board or paper.
Warning
Keep your hands and other extremities away from the front of the pressurised gun
during the spraying process. - the extremely high spraying pressure (120 bar) can
cause severe injuries.
Warning
Make sure that nobody is present in the spraying zone when the gun is started -
imminent risk of injury.
1. Start the gun to produce a spray pattern sample
(see also 5.2 "Starting / Stopping Requirements).
2. Inspect the sample and readjust the settings of the gun as may be required
(see also 5.4 "Spray Pattern Adjustments").
5.4 Spray
Pattern
Adjustments
The spray pattern of the PILOT WA 21 gun may be adjusted as follows:
Adjustment of the Material Flow Volume
The flow volume depends on the spray tip size which, in turn, determines the
spray jet width. So it is best to start with selecting the appropriate spray tip size.
The next step would then be an adjustment of the material pressure at the flow
regulator valve.
Adjustment of the Material Pressure
Select the required material pressure by adjusting the pump pressure in combina-
tion with the material flow regulator valve. Make sure to comply with the Operating
Instructions and Safety Warnings issued be the manufacturers concerned.
If you wish to change the spraying pattern beyond the adjustments outlined so far,
you should retool the spray gun (see 5.5 "Retooling of Spray Gun").
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