Installation; Operation - DeVilbiss AGX-550 Service Manual

INSTALLATION

Mount the gun with the stud (13) or on a 5/16" dia. rod tightening
adequately with the 1/4-28 X 1/4" set screws (Ref. No. 24). See
"ACCESSORIES" for mounting clamps.
FIGURE 2 TYPICAL INSTALLATION
Attach trigger/cylinder air hose and atomization air hose to con-
nections as indicated by markings on gun body. The air supply
should be filtered and regulated. Attach material hose to fluid
inlet on the body. Fluid can be recirculated by installing a fluid
fitting (AGX-415) (order separately) at recirculating port. See
Caution below.
The fluid inlet and recirculating ports have a tapered
seating surface intended for use with the AGX-415
fitting. Do not substitute other fittings as fluid leak-
age will occur.
If replacing the atomization air connection (15) with
an elbow type connection, be aware of a possible air
flow (CFM) limitation. A 1/4" I.D. 90° elbow will only
pass 20 CFM @ 40 psi. Some air caps require more
than 20 CFM. Spray performance could be affected.

OPERATION

1. Mix, prepare and strain material to be sprayed according
to paint manufacturer's instructions. Use a lint free mesh
to strain material.
2. Turn on cylinder air at source of supply. Supply air should be
a minimum of 50 PSI (3.5 bar). For consistant operation the
pressure should be regulated. If 50 psi cylinder air pressure
is not available, the red inner spring (31) can be removed.
This allows a minimum cylinder pressure of approximately
37 psi.
If red inner spring (31) is removed, atomization pres-
sure should not exceed 70 psi (will result in gun not
shutting off).
3. Turn needle adjustment knob (25) counterclockwise sev-
eral turns. With cylinder air on, turn adjustment knob (25)
clockwise until it contacts piston (19) (for maximum fluid
flow). Back knob out 1/2 turn.
Due to close part tolerances, actuate gun on and off 7 or
8 times to "break-in" the packings. Do this with material
supply off.
SB-2-624-X (6/2017)
Note
Note
Note
4. Adjust atomization air pressure to 50 PSI (3.5 bar). Aways
attempt to keep pressure as low as possible to minimize
overspray. The fluid pressure should be between 10 to 15
PSI (0.7 to 1.0 bar).
5. Open hand valve and/or trip automatic valve if installed
in system and observe spray pattern. Adjust air and fluid
pressures until desired pattern is obtained. Control fluid
pressure at source of supply. If desired regulation is not
practical at this point, restrict flow by turning adjustment
knob (25) clockwise.
6. The width of spray pattern is controlled by adjusting valve
(23) marked "FAN". With "FAN" valve screwed fully clock-
wise, spreader air will be closed off causing a round pattern.
By gradually opening this valve, pattern changes to a fan
spray. The width is determined by amount valve is opened.
Atomization air is adjusted by regulating supply air to gun.
CHART 2 FLUID TIPS AND NEEDLES
AGX-550 GUN – 400 Gr. Stainless Tip / 303 Gr. Stainless Needle
Tip
in. mm Fluid Tip Number
Size
AC .110" 2.8
D .086" 2.2
E .070" 1.8
FF .055" 1.4
FX .042" 1.1
G .028" 0.7
AGX-553 GUN – 303 Gr. Stainless & UHMW Poly.
Tip
in. mm Fluid Tip Number
Size
E .070" 1.8
FF .055" 1.4
FX .042" 1.1
AGX-552 GUN – Carbolloy - Tip / Needle Set
Tip If this Number on
in. mm
Size
D .086" 2.2
EE .070" 1.8
FF .055" 1.4
Adjustments to fan may be controlled remotely by using the
optional KK-4955 fan control adapter to replace the AGG-403
control valve (23).
FIGURE 2A AIR CIRCUIT EXAMPLE WITH
OPTIONAL KK-4955 REMOTE FAN CONTROL
7. Close automatic valves and begin operation.
3 / 12
Needle Number
AV-2115-AC AGX-402-AC
AV-2115-D AGX-402-D
AV-2115-E AGX-402-E
AV-2115-FF AGX-402-FF
AV-2115-FX AGX-402-FX
AV-2115-G AGX-402-G
Needle Number
AV-4915-E AGX-402-E
AV-4915-FF AGX-402-FF
AV-4915-FX AGX-402-FX
Tip / Needle Set
➡
Tip order
AV-1415-D AGX-4410-D
AV-1415-EE AGX-4410-EE
AV-1415-FF AGX-4410-FF
www.carlisleft.com
EN