1 General
1.1
Identification of Model Version
Model:
PILOT
WA
21
Type:
Airless - Automatic Spray Gun
V 20 952
Airless - Automatic Spray Gun - U
V 20 953
Manufacturer:
WALTHER Spritz- und Lackiersysteme GmbH
Kärntner Strasse 18-30
D-42327 Wuppertal - Germany
TEL: 0202/787-0
FAX: 0202/787-217 • www.walther-pilot.de
1.2 Normal
Use
The airless - automatic spray gun model PILOT WA 21 is exclusively designed for
use with all airless-sprayable material types and grades such as, for example:
• paints and lacquers
• greases, oils and corrosion preventives
• adhesive compounds
• ceramic glazes
• pickling solutions
If your specific material is not listed above, please contact us for further and detailed
information.
Please note that sprayable material may only be applied to workpieces and/or similar
items.
The temperature of the spraying material shall never exceed 80° C.
The term "normal use" also implies that any and all safety warnings, operational
handling details, etc., as contained in these Operating Instructions, are carefully read,
understood and duly complied with.
This equipment complies with the explosion protection requirements of Directive 94/9/
EC (ATEX) for the explosion group, equipment category and temperature class indi-
cated on the type plate. When using the equipment, the requirements specified in
these Operating Instructions must be observed at all times.
The technical data indicated on the equipment rating plates and the specifications in
the chapter "Technical Data" must be complied with at all times and must not be
exceeded. An overloading of the equipment must be ruled out.
The equipment may be used in potentially explosive atmospheres only with the
authorisation of the relevant supervisory authority.
The relevant supervisory authority or the operator of the equipment are respon-
sible 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 require-
ments.
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 equip-
ment must be put out of operation immediately and WALTHER Spritz-und
Lackiersysteme must be consulted.
Grounding / Equipotential Bonding
You must ensure that the spray gun is properly earthed (grounded) either separa-
tely or in connection with the equipment with which it is being used (maximum
resistance 106
).
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 and
considered as improper use in contrast to the original engineering design concept.
The term "improper use" also includes such operations as may be:
• spraying of material onto persons and animals
• spraying of liquid nitrogen, etc.
2 Technical
Description
The WALTHER PILOT WA 21 is a pneumatic-controlled airless - automatic spray
gun of extreme mini-sized design. Its maximum operating pressure rates 120 bar.
The gun body is made of stainless steel with hard-coated surfaces inside and out-
side. The spraying medium is fed to the gun in pressurized condition by a piston
oder diaphragm pump and atomized the moment it exits from the noozle.
The PILOT WA 21 spray gun is controlled across a 3/2-way solenoid valve which,
upon actuation, directs control air into the cylinder inside the gun body so as to
open - in sequence - the material input.
Closing of the 3/2-way valve is followed by the control air escaping from the cylin-
der inside the gun body, upon which the spring-loaded material control needle
returns to its initial position, where it shuts the material input off.
The control air pressure must rate at least 5 bar. This automatic spray gun is basi-
cally designed for operation in circulation systems, with one of the bores sealed
with a screw plug which, once removed, can be replaced with a material connec-
tion (Item 21). The gun is now ready for connection to a circulation system.
All commercial airless spray noozles can be used in this PILOT WA 21 gun.
2
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