The equipment may be used in potentially explosive atmospheres only with the aut-
horisation of the relevant supervisory authority.
The relevant supervisory authority or the operator of the equipment are
responsible for determining the explosion hazard (zone classification).
The operator must check and ensure that all technical data and the marking of the
equipment in accordance with ATEX are compliant with the necessary requirements.
The operator must provide corresponding safety measures for all applications in
which the breakdown of the equipment might lead to danger to persons.
If any irregularities are observed while the equipment is in operation, the equipment
must be put out of operation immediately and WALTHER PILOT must be consulted.
Grounding / Equipotential Bonding
You must ensure that the spray gun is properly earthed (grounded) either separately
or in connection with the equipment with which it is being used (maximum resistance
10
6
Ω
).
1.3
Improper Use
This spray gun shall not be used for purposes other than set forth in the above
Chapter
Normal Use
. Any other form of use and/or application is prohibited.
Improper use is for example:
• spraying of material onto persons and animals
• spraying of liquid nitrogen, etc.
2
Technical Description
The models PILOT WA 450, WA 451, WA 452 and WA 453 are automatic air-control-
led guns operating in combination with a 3/2-way control valve. Hand, foot or sole-
noid-actuated valves can be used.
Actuation of the 3/2-way valve directs control air into the cylinder inside the gun so as
to open - in sequence - the atomizing air (round - and wide/flat air) and the material
input.The control air, round jet and wide/flat jet are adjusted external by the plant
(see Operating instructions of the plant systems manufacturer).
Closing of the 3/2-way valve is followed by the control air escaping from the cylinder
inside the gun, upon which the spring-loaded material control needle returns to its
initial position, where it shuts the material and atomizing air input off.
After this, the atomising air is switched off by the 3/2-way valve.
The models PILOT WA 452 and WA 453 are solely low-pressure spray guns and
operate with a spraying pressure of 0.7 bar using an inlet pressure of 4.5 bar.
3
Generally Applicable Safety Precautions
All applicable accident prevention rules and regulations as well as other recogni-
sed industrial safety and health rules and regulations must be observed at all
times.
Use the spray gun only in well-ventilated rooms. Fire, naked flames and smoking
are strictly prohibited within the working area. WARNING – during the spraying of
flammable materials (e.g. lacquers, adhesives, cleaning agents, etc.), there is an
increased risk to health as well as an increased risk of explosion and fire.
Measures must be taken to ensure that the spray gun is sufficiently grounded
(earthed) by means of a conductive air hose (maximum resistance 10
6
Ω
).
Before carrying out maintenance or servicing work, always ensure that the air and
material feed to the spray gun have been de-pressurised. Risk of injury!
When spraying materials, do not place your hands or other parts of the body in
front of the pressurised nozzle or the spray gun. Risk of injury!
Never point the spray gun at persons or animals. Risk of injury!
Always observe the spraying and safety instructions given by the manufacturers
of the spraying material and the cleaning agent. Aggressive and corrosive materi-
als in particular can be harmful to health.
Exhaust air containing particles (overspray) must be kept away from the working
area and personnel. In spite of these measures, always wear the regulation breat-
hing masks and protective overalls when using the gun. Airborne particles repre-
sent a serious health hazard!
Always wear hearing protection when using the gun or when in the vicinity of a
gun that is in use. The noise level generated by the spray gun is approx. 83 dB
(A).
After carrying out assembly or maintenance work, always ensure that all nuts,
bolts and screw connections have been fully tightened before the gun is used.
Use only original replacement parts, since WALTHER can only guarantee safe
and fault-free operation for original parts.
For further information on the safe use of the spray gun and the spraying materi-
als, please contact WALTHER Spritz- und Lackiersysteme GmbH, D-42327
Wuppertal, Germany.
3
4
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