NOTE: A manifold is required for each gun to be installed. Refer to the Parts section for manifold
information.
Orifice Size
Application
General Metal0.020 (0.5)24B33324B33424B335
General Metal0.030 (0.8)24A74724A75424A761
General Metal0.042 (1.1)24A74824A75524A762
in. (mm)ConventionalHVLPCompliant
General Metal0.055 (1.4)24A74924A75624A763
General Metal0.070 (1.8)24A75024A75724A764
General Metal with Fluid Control Knob0.030 (0.8)24A75124A75824A765
General Metal with Fluid Control Knob0.042 (1.1)24A75224A75924A766
General Metal with Fluid Control Knob0.055 (1.4)24A75324A76024A767
High Wear0.059 (1.5)24A77424A77624A778
High Wear0.070 (1.8)24A77524A77724A779
High Wear0.086 (2.2)24B336
High Wear0.110 (2.8)24C316
The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The exclamation point symbol alerts you to a general warning and the hazard symbol refers
to procedure-specific risk. Refer back to these warnings. Additional, product-specific warnings
may be found throughout the body of this manual where applicable.
WARNING
FIRE AND EXPLOSION HAZARD
Flammable fumes, such as solvent and paint fumes, in work area can ignite or
explode. To help prevent fire and explosion:
•Use equipment only in well ventilated area.
•Eliminate all ignition sources; such as pilot lights, cigarettes, portable electric
lamps, and plastic drop cloths (potential static arc).
•Keep work area free of debris, including solvent, rags and gasoline.
•Do not plug or unplug power cords, or turn power or light switches on or off when
flammable fumes are present.
•Ground all equipment in the work area.
•Use only grounded hoses.
•Hold gun firmly to side of grounded pail when triggering into pail.
•If there is static sparking or you feel a shock, stop operation immediately. Do not
use equipment until you identify and correct the problem.
•Keep a working fire extinguisher in the work area.
EQUIPMENT MISUSE HAZARD
Misuse can cause death or serious injury.
•Do not operate the unit when fatigued or under the influence of drugs or alcohol.
•Do not exceed the maximum working pressure or temperature rating of the lowest
rated system component. See Technical Data in all equipment manuals.
•Do not leave the work area while equipment is energized or under pressure. Turn
off all equipment and follow the Pressure Relief Procedure in this manual when
equipment is not in use.
•Check equipment daily. Repair or replace worn or damaged parts immediately with
genuine manufacturer’s replacement parts only.
•Do not alter or modify equipment.
•Use equipment only for its intended purpose. Call your distributor for information.
•Route hoses and cables away from traffic areas, sharp edges, moving parts, and
hot surfaces.
•Do not kink or over bend hoses or use hoses to pull equipment.
•Keep children and animals away from work area.
•Comply with all applicable safety regulations.
313516G3
Warnings
WARNING
PRESSURIZED EQUIPMENT HAZARD
Fluid from the gun/dispense valve, leaks, or ruptured components can splash in the
eyes or on skin and cause serious injury.
•Follow Pressure Relief Procedure in this manual, when you stop spraying and
before cleaning, checking, or servicing equipment.
•Tighten all fluid connections before operating the equipment.
•Check hoses, tubes, and couplings daily. Replace worn or damaged parts immediately.
TOXIC FLUID OR FUMES HAZARD
Toxic fluids or fumes can cause serious injury or death if splashed in the eyes or on
skin, inhaled, or swallowed.
•Read MSDS’s to know the specific hazards of the fluids you are using.
•Store hazardous fluid in approved containers, and dispose of it according to applicable guidelines.
•Always wear impervious gloves when spraying or cleaning equipment.
PERSONAL PROTECTIVE EQUIPMENT
You must wear appropriate protective equipment when operating, servicing, or when
in the operating area of the equipment to help protect you from serious injury, including eye injury, inhalation of toxic fumes, burns, and hearing loss. This equipment
includes but is not limited to:
•Protective eyewear
•Clothing and respirator as recommended by the fluid and solvent manufacturer
•Gloves
•Hearing protection
4313516G
Selection Charts
TERMS
Selection Charts
Light Fluid: Up to 18 seconds with No. 2 Zahn
cup (20 centipoise)
Heavy Fluid: Greater than 28 seconds with
No. 2 Zahn cup (greater than 64 centipoise) --
2.8 Volatile Organic Compounds, High-solid
Medium Fluid:19 to 28 seconds with No. 2
Zahn cup (20-64 centipoise)
An HVLP gun is a high transfer efficiency gun
that limits the air pressure at the air cap to
10 psi (0.07 MPa, 0.7 bar) maximum. In some
areas, an HVLP gun is required for compliance
with environmental standards. See the Air Cap
chart, page 7, for maximum inlet pressures.
6313516G
Compliant Guns
A compliant gun is a high transfer efficiency
gun that has been tested to have a transfer
efficiency greater than or equal to HVLP guns.
In addition, the compliant air cap consumes
much less air than the HVLP air cap. Graco
compliant guns have no restrictions on air cap
pressures. See the Air Cap chart, page 7, for
maximum inlet pressures.
Conventional Guns
An airspray gun has excellent atomization and
high production rates typically with some
reduction in transfer efficiency.
Proper Needle/Nozzle Selection
Selection Charts
The spray gun's needle/nozzle kits range in
size to provide different fluid flow rates. As a
•For low flow rates or light viscosity fluid,
select the smaller nozzle sizes.
general guideline, use the fluid nozzle that will
give the required flow with the needle fully triggered at a fluid pressure of 5–20 psi
(0.035–0.14 MPa, 0.35–1.4 bar).
•For high flow rates or high viscosity fluid,
select the larger nozzle sizes.
•For abrasive fluids, the high wear gun models are recommended.
Air Caps
Atomizing Air
Air Cap
Part
No.TypeApplication
289773 Conventional General Metal
289784 Conventional General Metal0.070 (1.8)N/AN/A
See the chart to determine air consumption. Add the air consumption values shown for the atomizing air and fan air pressures to get the total air consumption. For example, air cap 24B544 with
20 psi atomizing air pressure uses 3 scfm atomizing air. A 30 psi fan inlet pressure adds 5 scfm
fan air for a total of 8 scfm air consumption.
The Automatic AirPro spray gun can spray
most coatings or finishes currently being used
for automotive, industrial, aerospace, marine,
wood, plastic and architectural applications,
while easily operating from paint delivery systems, such as pressure pots or remote pumps
for production line operation.
The air regulator must have a minimum air flow
capacity of 30 scfm at 100 psi (0.7 MPa, 7.0
bar) air pressure.
Ventilate Spray Booth
•Check and follow all national, state, and
local codes regarding air exhaust velocity
requirements.
4. Install the gun on the manifold, using the
four screws (13). Start the threads of all
four screws. Tighten the front two screws
first, and then tighten the back two. Torque
all four screws evenly to 65 in-lb (7.3 N•m).
Non-circulating System
1. See FIG. 1. Apply anti-seize lubricant to the
threads and mating faces of the manifold
(101), plug (109), and elbow (107), supplied unassembled.
2. Install an elbow (107) in one fluid port of
the manifold (101), and a plug (109) in the
other port.
3. Install the internal plug (19) in the gun fluid
port on the same side as the manifold plug.
4. Connect the fluid supply line to the fluid
inlet elbow (107).
•Check and follow all local safety and fire
codes.
Configure Gun and Manifold
The gun is supplied with an internal fluid plug
and seals (19, 20, 21). To use the gun in a circulating system, remove the internal plug. In a
non-circulating system, leave the plug in place
to minimize flush time.
Circulating System
1. Apply anti-seize lubricant to the threads
and mating faces of the manifold (101) and
the elbows (107), supplied unassembled.
2. Install the elbows (107) in both fluid ports of
the manifold (101).
3. Connect the fluid supply line to one elbow
and the fluid return line to the other. The
manifold fluid ports are reversible.
5. Install the gun on the manifold, using the
four screws supplied. Start the threads of
all four screws. Tighten the front two
screws first, and then tighten the back two.
Torque all four screws evenly to 65 in-lb
(7.3 N•m).
1
Remove when used in circulating systems.
2
Replace with elbow (107) when used in
circulating systems.
1. Install the supplied 1/4 in. tube fitting into
the cylinder (CYL) air port.
2. Install 3/8 in. tube fittings into the atomization (ATOM) air port and the fan (FAN) air
port.
CYL
ATOM
FAN
ti8211a
FIG. 2: Air Fittings
Ground Air Compressors and
Hydraulic Power Supplies
Ground the air compressors and hydraulic
power supplies according to the manufacturer
recommendations.
Ground Spray Gun
Ground the spray gun by mounting the manifold to a properly grounded reciprocator, robot,
or stationary mount. Check the electrical resistance between the manifold and a true earth
ground. The resistance must be less than 1
megohm.
Ground Fluid Supply Container
Ground the fluid supply container according to
local code.
Ground Object Being Sprayed
Ground the object that is being sprayed
according to local code.
Ground System
The following grounding instructions are minimum requirements for a system. Your system
may include other equipment or objects that
must be grounded. Check your local electrical
code for detailed grounding instructions for
your area and type of equipment. Your system
must be connected to a true earth ground.
Ground Pump/Fluid Supply
Ground the pump by connecting a ground wire
and clamp between the fluid supply and a true
earth ground as instructed in your separate
pump instruction manual.
Ground Solvent Pails
Ground all solvent pails that are used when
flushing according to local code. Use only
metal pails, which are conductive. Do not place
the pail on a non-conductive surface, such as
paper or cardboard, which interrupts the
grounding continuity.
313516G11
Installation
Mount Gun
Reciprocating Arm Rod Mount
To mount the gun on a reciprocating arm rod
[0.5 in. (13 mm) diameter maximum]:
1. Insert the mounting bar (A) through the
hole in the manifold as shown in FIG. 3.
NOTE: Use the 1/8 in. alignment pin (P) to
assist in orienting the gun.
2. Secure the gun to the bar by tightening the
mounting screw (B).
B
P
Stationary Support
To mount the gun on a stationary support
(refer to FIG. 4 and to the correct mounting
hole layout for your manifold, pages 38-42):
1. Align the manifold with the alignment pins.
Locate alignment pins and holes per the
mounting hole layout.
2. Secure the gun to the support with two M5
x 0.8 capscrews (C). The screws must be
long enough to engage the threaded holes
in the gun manifold to a depth of 1/4 in.
(6 mm).
A
FIG. 3: Reciprocating Arm Mount
C
ti13588a
ti13587a
FIG. 4: Stationary Support Mount
12313516G
Retrofit Adapter Plate
The retrofit adapter plate enables the manifold
to be attached to a variety of bolt patterns.
To mount the gun using the retrofit adapter
plate (Kit 288197; See Accessories,
page 34):
1. Mount adapter plate to manifold using the
three screws provided with the kit. (See
FIG. 5 and the mounting hole layout on
page 42.)
2. Bolt plate to mounting surface using four
M5 x 0.8 capscrews. Refer to the correct
mounting hole layout for your manifold,
pages 38-41.
Installation
FIG. 5: Retrofit Adapter Plate Mount
ti13589a
313516G13
Setup
Setup
Connect Air Line
NOTE:
•You must install an air pressure regulator (F) on each gun air line to control air
pressure to the gun. See FIG. 6.
•If your regulated air source does not
have a filter, install an air filter (G) on
each air line to ensure a dry, clean air
supply to the gun. Dirt and moisture can
ruin the appearance of your finished
workpiece. See FIG. 6.
•Install a bleed type air shutoff valve (E)
on each gun air supply line, downstream of the gun air regulator, to shut
off air to the gun.
1. For manifolds with a separate ATOM and
FAN port, the gun cylinder, fan, and atomization air must be supplied and regulated
separately. For the manual fan valve manifold, only one supply line is required for
both atomization and fan air.
NOTE: The gun atomizing and fan air inlets
are 3/8 in. O.D. tubing. The cylinder air inlet
accepts 1/4 in. (6.3 mm) O.D. tubing. Use 3/8
in. (9.5 mm) O.D. tubing for fan and atomization air to minimize excessive pressure drop in
the hoses.
Connect Fluid Hose
NOTE:
•Before connecting the fluid line, blow it
out with air and flush it with solvent. Use
solvent that is compatible with the fluid
to be sprayed.
•Install a fluid regulator (L) on the fluid
line to control fluid pressure to the gun.
•Install a fluid shutoff valve (M) to shut off
the fluid supply to the gun.
•Filter the fluid line of coarse particles
and sediment to avoid clogging the fluid
nozzle and causing finishing defects.
Inline fluid filter 24B707 is available.
See Accessories, page 34.
1. Connect the fluid supply hose (J) to the gun
fluid inlet (S), 1/4 npsm thread. See FIG. 8.
2. Connect the other end of the fluid hose (J)
to a regulated fluid supply outlet (M).
3. In a circulating system, connect a
grounded fluid return hose to the gun fluid
outlet (T). See FIG. 8.
In a non-circulating system, remove the
gun fluid outlet fitting (T) and plug the outlet
port with the pipe plug supplied. See FIG. 8.
2. Connect each air hose (D) to a regulated
air supply line (H).
K
L
M
H
J
G
FIG. 6: Connect Air Line
14313516G
FED
ti01990
ti7016a
FIG. 7: Connect Fluid Hose.
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