SERVICE BULLETIN
SB-2-614-C
IMPORTANT: Before using this equip-
ment, read all safety precautions on
page 2 and instructions. Keep for
future use.
GUN DESCRIPTION
The FLG3 is a light weight, general
purpose gravity feed spray gun for
spraying applications suitable for use with a
wide variety of common coating materials.
Model FLG-691 is an HVLP spray gun, and
model FLG-695 is conventional.
This gun is supplied with a 1 Liter Aluminum
Cup (GFC-502).
Halogenated hydrocarbon sol-
vents - for example; 1, 1, 1- trichlo-
roethane and methylene chloride
- can chemically 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 thorough cleaning will
be required and the necessity for replace-
ment of parts will be increased.
HVLP MODELS ONLy:
HVLP models of this gun were 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).
HVLP models of this gun will produce
approximately 10 psi cap pressure at 23 psi
gun inlet pressure, as measured at the gun
inlet. An air cap test kit (see Accessories)
should be used to insure 10 psi cap pressure
is not exceeded.
The No. 3 (HVLP) air cap requires a 13 cfm
air supply at the gun inlet of 23 psi max.,
measured with the trigger pulled.
CONVENTIONAL MODELS ONLy:
The No. 1 air cap requires 10 cfm air supply
at a gun inlet of 40 psi, measured with the
trigger pulled.
FLG3 GRAVITY FEED SPRAY GUN AND CUP
MODELS: FLG-691 and FLG-695
CUP DESCRIPTION
GFC-502 – 1 Liter Aluminum Cup
The cup is constructed from durable
aluminum to provide trouble-free operation.
The cup insert is electroless nickel plated
brass. The disposable cup lid is recyclable
and is constructed with recycled polyeth-
ylene. The lid has a unique drip check to
prevent paint from dripping out of the vent
in the lid.
ASSEMBLy OF CUP TO GUN
This gun is assembled with a cup gasket
(#7) (blue) in the fluid inlet of the gun body.
Place filter (#29) in the cup outlet at this time
if desired. See Cup Drawing on page 4. As-
semble cup to gun and tighten hand tight.
INSTALLATION
Note
Protective coating and rust inhibi-
tors have been used to keep the
gun in good condition prior to
shipment. Before using the gun,
flush it with solvents so that these
materials will be removed from
fluid passages.
For maximum transfer efficiency, do not
use more pressure than is necessary to
atomize the material being applied.
Connect the gun to a clean, moisture and oil
free air supply using a hose size of at least
5/16" I.D. hose. Do not use 1/4" I.D. hose.
(25' x 1/4" hose at 18 CFM has a pressure
loss of 25 psi. 25' x 5/16" hose at 18 CFM
has a pressure loss of 8 psi.)
Note
Depending on hose length, larger
I.D. hose may be required. Install
an HAV-501 air gauge at the gun
handle and air cap test kit over tip.
When gun is triggered on, adjust
regulated pressure to desired
setting to provide a maximum of
10 psi at the air cap. Do not use
more pressure than is necessary
to atomize the material being ap-
plied. Excess pressure will create
additional overspray and reduce
transfer efficiency.
(continued on page 3)
Note
If quick connects are required,
use only high flow quick connects
approved for HVLP use, such as
DeVilbiss HC-4419 and HC-4699.
Other types will not flow enough
air for proper gun operation.
Note
If an air adjusting valve is used
at the gun inlet, use DeVilbiss
Model HAV-500 or HAV-501. Some
competitive adjusting valves have
significant pressure drop that
can adversely affect spray per-
formance. Models HAV-500 and
HAV-501 have minimal pressure
drop, which is important for HVLP
spraying.
OPERATION
Mix, prepare and strain the material to
be sprayed according to the paint maufac-
turer's instructions.
Strain material through a 60 or 90 mesh
screen.
FILLING WITH PAINT
Fill the cup with paint to the full mark. Do
not overfill.
INSTALLING THE LID
Place plastic lid on the top of the cup, and
push in the center of the lid to assemble lid.
Fold vent cap and push onto center portion
of lid (if vent cap is not already assembled).
PAINTING
Open the spreader adjustment valve (8) (Fan)
by turning the valve stem counterclockwise.
Close the fluid needle adjusting knob (14)
by turning clockwise.
Turn on air supply and set gun inlet
pressure; 23 psi for HVLP, 40 psi for conven-
tional use. Some materials can be sprayed
at lower pressures, improving transfer
efficiency.
Spray a test area. Turn the fluid needle
adjusting knob (14) counterclockwise until
a full coat is obtained.
Replaces SB-2-614-B
Gun Repair Kit FLG-488
Summary of Contents for FLG-691
Page 7: ...SB 2 614 C Page 7 Notes...
