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Technical Description
The models of the PILOT WA 800-version are automatic air-controlled guns opera-
ting in combination with a 3/2-way control valve. Hand, foot or an electrical pulse
(sensor etc.) can be used.
With internal control:
Actuation of the 3/2-way control valve directs control air into the cylinder inside the
gun so as to open - in sequence - the atomizing air and the material input.
The spray jet contour (flat/wide/round) are adjusted for the models PILOT WA 800-
HD / PILOT WA 810-HD-U / WA 820-ND / WA 830-ND-U / WA 840-MD / WA 850-
MD-U / PILOT WA 870-HD-K / WA 871-HD-K-U / WA 872-ND-K and WA 873-ND-K-
U at the gun by way of regulating screws.
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 needle returns to its iinitial
position, where it shuts the material and atomizing air input off.
Without internal control:
At first the atomizing air (round- and wide/flat jet air pos. 27) is openened by a 3/2-
way control valve. Then activate the control air that push back the piston and the
material needle to open the material supply. For the models PILOT WA 805-HD /
WA 815-HD-U / WA 825-ND / WA 835-ND-U / WA 845-MD and WA 855-MD-U the
spray jet contour (flat/wide/round) is adjusted by a pressure regulator in the plant.
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 needle returns to its iinitial
position, where it shuts the material and atomizing air input off.
The material flow rate is adjusted for all models at the gun by the cap pos. 23.
The material inlet duct of PILOT WA 800-models can be opened manually so as to
permit, for example, cleaning of a clogged material nozzle.
The spray guns PILOT WA 800-models can be connected to material pressure
tanks and pumping systems.
The models PILOT PILOT WA 810-HD-U / WA 815-HD-U / WA 830-ND-U / WA 835-
ND-U / WA 850-MD-U / WA 855-MD-U / WA 871-HD-K-U and WA 873-ND-K-U per-
mit connection to circulation systems.
The spray guns PILOT WA 400 / 470-K and WA 420 / 472-K can be connected to
material pressure tanks and pumping systems.
The models PILOT WA 820-ND bis WA 835-ND-U / WA 872 ND-K and WA 873 ND
-K-U are solely low-pressure spray guns and operate with a atomizing air pressure
of 0.7 bar using an air input pressure of 4.5 bar.
For the models PILOT WA 840-MD to WA 855-MD-U the air input pressure is from
3.0 to 3.3 bar for a spraying air of 1.2 to 1.4 bar
The models PILOT WA 800 and the corresponding versions of adhesive coating
PILOT WA 870-HD-K - WA 873-ND-K-U are not designed for manual operation, and
must be installed in a suitable gun mounting device.
The term normal use also implies that any and all safety warnings, operational hand-
ling details, etc., as stated in these operating instructions, must be carefully read,
understood and duly complied with.
This equipment complies with the explosion protection requirements of Directive
94/9/EC (ATEX 100a) for the explosion group, equipment category and temperature
class indicated on the type plate. When using the equipment, the requirements speci-
fied 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 aut-
horisation of the relevant supervisory authority.
The relevant supervisory authority or the operator of the equipment are res-
ponsible 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
1.2 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.
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