Operational Handling; Safety Warnings; Starting/Stopping Requirements; Spray Pattern Test - WALTHER PILOT PILOT WA 451 Betriebsanleitung

5

Operational Handling

5.1

Safety Warnings

Please pay special attention to the following safety warnings prior to taking this
spray gun into operation!
• Wear proper respiratory protection masks and protective overalls, whenever
you are operating this spray gun. Air-borne particles represent a health
hazard.
• Make sure to wear suitable haering protectors. The gun produces sound
levels of up to 86 dB (A) which may cause hearing defects.
• Open fires, naked lights and smoking prohibited in the working area. Spraying
of readily flammable media such as paints and adhesive compounds is
always accompanied by the risk of fire and explosion.
5.2 Starting / Stopping Requirements
The following requirements must be met before taking this spray gun into operati-
on:
• control air must be available at the gun
• atomizing air (round - and wide/flat air) must be available at the gun
• material pressure must be available at the gun.
Caution
The material pressure shall not exceed
• 6 bar, as, otherwise, the functional reliability of the spray gun will suffer.
Adjust the control air pressure to
• at least 4,5 bar, in order to operate the spray gun.
The operation of the spray gun can be started/stopped by way of the 3/2-way con-
trol valve (see the Operating Instructions of the plant systems manufacturer).
Warning
It is important to remember that the spray gun must 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 can be tested using a work piece sample, a sheet of metal,
cardboard or paper.
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Warning
Keep away from the front of the spray gun - imminent risk of injury.
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 5.2. Starting/Stopping
Requirements).
2. Inspect the sample and readjust the settings of the gun as may be required
(see 5.4 Spray Pattern Adjustments).
5.4

Spray Pattern Adjustments

The spray pattern of the PILOT WA 450, WA 451, WA 452 and WA 453 can be
adjusted as follows:
Adjustment of the Control Air
The control air is adjusted external by the plant (see Operating instructions of the
plant systems manufacturer).
Adjustment of the Material Flow Rate
Turn cap (1) from the standard position
1
2
(= notch mark on the piston housing)
• to the inside in order to decrease the materi-
al flow rate.
• to the outside in order to increase the mate-
rial flow rate.
The material flow through the nozzle can be
performed without using atomizing air
(round - and wide/flat air), when the drawbar
(2) is used.
Adjustment of the Material Pressure
This adjustment can only be made at the controls of the pump or the material pres-
sure tank. Please comply with the operating instructions and safety warnings issu-
ed by the manufacturers concerned.
Adjustment of the Round Jet and Wide/Flat Jet
The round jet and wide/flat jet are adjusted external by the plant (see Operating
instructions of the plant systems manufacturer).
If you wish to change the spraying pattern beyond the adjustments outlined so far,
you must retool the spray gun (See 5.5 Retooling of Spray Gun).
WALTHER offers a great variety of air cap / material nozzle / -needle combinations
for this purpose.
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