Abrasive
Abrasive
Abrasive Material
Material
Material Gun
Gun
Gun Setup
Setup
Setup Procedure
Procedure
Procedure
NOTE:
NOTE:
NOTE: To extend wear life, perform the following
tasks each day:
• Clean the gun. See
• Inspect the electrode and replace if damaged. See
Electrode Replacement, page 61
.
To extend wear life with abrasive, metallic, and
extremely abrasive materials, do the following:
1.
To convert a gun for abrasive materials:
• Select a precision high wear
or high wear nozzle.
See
Fluid Nozzle Selection Chart, page 93
Size the nozzle properly to reduce fluid
pressure below 30 psi (0.21 MPA, 2.1 bar),
producing an 8-12 in (200-300 mm) fluid
stream.
• Use 24N632 ES On-Off and Fixed Fluid Valve.
2.
Follow steps 1–18 in the
3.
Start the pump. Adjust the fluid regulator until the
stream from the gun travels 8-12 in. (200-300
mm) before falling off. Typically, if fluid pressure
is below 5 psi (.04 MPa, 0.4 bar) or above 30 psi
(0.21 MPa, 2.1 bar), a change of nozzle size is
recommended.
NOTE:
NOTE:
NOTE: Operate the gun with the fluid adjustment
knob in the full flow position at all times or
install 24N632 ES On-Off and Fixed Fluid Valve.
Always use an external fluid regulator. Do not
use the fluid adjustment knob to set the fluid
pressure.
4.
Turn on the air to the gun. Turn ON (I) the ES
On-Off switch (J).
5.
Spray a test pattern. Check the atomization. If
over-atomization occurs at minimum pressure,
adjust the atomizing air restrictor valve. If
atomization is inadequate, increase air pressure
or decrease fluid flow.
NOTE:
NOTE:
NOTE: Use the minimum atomizing air pressure
to extend electrode wire wear life. Reduce the
gun inlet air pressure or adjust the atomizing air
restrictor valve (G) counterclockwise to reduce
atomizing air when the application allows.
6.
Adjust the fan air adjustment valve.
• Fully open the fan air adjustment valve,
counterclockwise, for the longest pattern.
• Turn the valve clockwise to restrict the fan air
and create a shorter pattern.
NOTE:
NOTE:
NOTE: Use the minimum fan air pressure to
extend electrode wire wear life. Reduce the gun
inlet air pressure or adjust the fan air adjustment
valve (F) clockwise to reduce fan air when the
application allows.
7.
Spray a test piece. Examine the edges
for coverage. If wrap is poor, see
3A2496H
35