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25
5
Operation startup / Handling
The following requirements must have been met before you can operate the spray
gun:
•
The spray air pressure must always first be available at the spray gun
•
Only then may the material pressures be available at the spray gun
Attention
The material pressure may not be set higher than
1,5 bar
since proper functioning of
the spray gun may otherwise not be ensured.
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.
Spray pattern test
A spray pattern test should always be generated when:
•
the spray gun is used for the first time.
•
the spray material is replaced.
•
the gun has been disassembled for maintenance or repair.
The spray pattern test can be made on a sample work piece, sheet metal, cardboard
or paper.
Changing the spray pattern:
You can change the spray pattern at the PILOT SIL by making the following
settings :
a) adjust the spray cone
The spray cone is adjusted by screwing the air cap (item 1) forward or backward.
Once the desired jet size has been set, the air cap is locked with the adjusting collar
(item 2).
b)
adjust the material flow volume
The material flow volume depends on the nozzle diameter and the setting of the
material pressure at the pressure tank or material pressure regulator.
c) adjust the spray air
The spray air pressure is adjusted at the compressed air reduction valve of the com-
pressed air system. Please follow the directions and safety instructions of the manuf-
acturer. If you want to change the spray pattern beyond the options already mentio-
ned, the spray gun must be retrofitted. WALTHER offers a variety of different
air cap / material nozzle combinations.
6
Retooling and repairs
Warning
Prior to any repairs or replacements: Make sure that the spray gun is in depressu-
rized condition, i.e. all air and material 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
at the beginning (page 2) of these operating instructions.
6.1
Replacement of the material nozzle and the air cap
1. Unscrew the air cap (item 1) from the material nozzle (item 3).
2. Unscrew the material nozzle (item 3) with a wrench (7 mm) from the
support plate (item 5).
The installation of the new nozzle insert assembly and of the remaining parts in
reverse order.
Note
All sliding and moveable parts must be lubricated with a non-acidic, non-resinoge-
nic grease prior to installation.
7
Cleaning
Warning
Do not use any hard, sharp or pointed objects when cleaning the spray gun. Never
immerse the spray gun in solvent or any other cleaning solution. The functional
reliability and efficiency of the gun can otherwise not be guaranteed.
WALTHER is not responsible for any damage resulting from improper cleaning.
The gun does not need to be dismantled for cleaning.
1. Fill the cleaned material container with a cleaning fluid compatible with the
sprayed material.
2. Operate the spray gun.
3. Do not stop the spray gun until clear cleaning fluid emerges from the nozzle.
The entire system should then be depressurised until the gun is used again. Clean
the spray gun only with cleaning agents which have been recommended by the
manufacturer of the sprayed material and which do
not
contain the following con-
stituents:
•
halogenated hydrocarbons (e.g. 1,1,1-triclorethan, methylene cloride, etc.)
•
acids and acidic cleaning fluids
•
regenerated solvents (so-called cleaning thinners)
•
paint removers
The above-mentioned constituents cause chemical reactions on electroplated com-
ponents, resulting in corrosion damage.
