Preventive Maintenance; Operation - DeVilbiss FLG-CNS-115 Service Manual

FLG4 SIPHON / PRESSURE FEED SPRAY GUNS AND DeKUPS
IMPORTANT: Before using this equipment, read all safety
precautions on page 2 and instructions. Keep for future
use.
Halogenated hydrocarbon solvents - for example; 1, 1,
1- trichloroethane and methylene chloride - can chemi-
cally react with the aluminum in this gun and cause an
explosion hazard. Read the label or data sheet for the
material you intend to spray. Do not use spray materials
containing these solvents with this spray gun.
IMPORTANT: This gun may be used with most common coating
and finishing materials. It is designed for use with mildly corrosive
and non-abrasive materials. If used with other high corrosive or
abrasive materials, it must be expected that frequent and thor-
ough cleaning will be required and the necessity for replacement
of parts will be increased.

OPERATION

Strain material thru 60 or 90 mesh screen.
Model FLG-CNS-115:
The No. 1 (conventional) air cap requires an air supply at the gun
inlet of approximately 45 psi, measured with the trigger pulled
and can be operated from a 3 H.P. compressor.
HVLP Models FLG-HVS-322 and
FLG-HVP-315:
The No. 3 (HVLP) air cap requires an air supply at the gun inlet of
23 psi max., measured with the trigger pulled.
This gun was manufactured to provide maximum transfer efficiency
by limiting air cap pressure to 10 psi (complies with rules issued
by SCAQMD and other air quality authorities).
This gun will produce approximately 10 psi cap pressure at 23 psi
inlet pressure, as measured at the gun inlet. An air cap test kit (see
ACCESSORIES) should be used to ensure 10 psi cap pressure is
not exceeded.
Adjust fluid pressure to deliver the desired paint volume. Adjust
air pressure and fluid flow to provide a uniform dispersion of at-
omized paint throughout the pattern. Keep air pressure as low as
possible to minimize bounce - back and overspray. Excessive air
pressure will result in split patterns. Low air pressure will result in
heavy centered patterns and poor atomization. Excessive fluid flow
will result in heavy center spray patterns. Inadequate fluid flows
may cause the pattern to split. See "TROUBLESHOOTING" section.
SB-2-777-H (4/2015)
DISPOSABLE CUP SYSTEM
®

PREVENTIVE MAINTENANCE

To clean air cap and fluid tip, brush exterior with a stiff bristle
brush. If necessary to clean cap holes, use a broom straw or
toothpick if possible.
e x t r e m e
be used to prevent scratching or burring of the holes which will
cause a distorted spray pattern.
To clean fluid passages, remove excess material at source, then
flush with a suitable solvent. Wipe gun exterior with a solvent
dampened cloth. Never completely immerse in solvent as this
is detrimental to the lubricants and packings.
When replacing the fluid tip or fluid needle, replace
both at the same time. Using worn parts can cause fluid
leakage.
To prevent damage to the fluid tip (2) or fluid needle
(7), be sure to either:
• Pull the trigger and hold while tightening or loosening
the fluid tip, or
• Remove fluid needle adjusting knob (6) to relieve
spring pressure against needle collar.
Spray Gun Lubrication
Daily, apply a drop of SSL-10 spray gun lube at trigger bearing
stud and the stem of the air valve. The shank of the fluid needle
where it enters the packing nut should also be oiled. The fluid
needle packing (7) should be kept soft and pliable by periodic
lubrication. Make sure the baffle (4) and retaining ring (1) threads
are clean and free of foreign matter. Before assembling retaining
ring to baffle, clean the threads thoroughly, then add two drops
of SSL-10 spray gun lube to threads. The fluid needle spring (6)
and air valve spring (8) should be coated with a very light grease,
making sure that any excess grease will not clog the air passages.
For best results, lubricate daily.
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If a wire or hard instrument is used,
c a r e
Note
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m u s t