Graco 312579K User Manual
Instructions-Parts
™
AirPro
Feed Airspray Gun
Conventional, HVLP, and compliant guns for specialty industrial applications.
For professional use only.
100 psi (0.7 MPa, 7 bar) Maximum Air Inlet Pressure
Important Safety Instructions
Read all warnings and instructions in
this manual. Save these instructions.
Gravity
312579K
EN
See page 3 for model information.
ti11095A
ll 2 G
Contents
Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Gravity Feed without Cup . . . . . . . . . . . . . . . . . . 3
Gravity Feed with Plastic Cup . . . . . . . . . . . . . . . 3
Gravity Feed with 3M
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Gun Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Conventional Guns . . . . . . . . . . . . . . . . . . . . . . . 5
HVLP Guns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Compliant Guns . . . . . . . . . . . . . . . . . . . . . . . . . 5
Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Ground the Gun . . . . . . . . . . . . . . . . . . . . . . . . . 6
Flush Before Using Equipment . . . . . . . . . . . . . . 6
Adjust Spray Pattern . . . . . . . . . . . . . . . . . . . . . . 7
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Pressure Relief Procedure . . . . . . . . . . . . . . . . . 8
Apply Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Volatile Organic Compounds (VOC) Regulation . 8
Daily Gun Maintenance . . . . . . . . . . . . . . . . . . . . . . 9
General Tasks . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Flush . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Clean Gun and Cup . . . . . . . . . . . . . . . . . . . . . . 9
Clean Nozzle and Air Cap . . . . . . . . . . . . . . . . . 10
Compliant Cleaning Methods . . . . . . . . . . . . . . 10
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . 12
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Fluid Inlet Fitting Replacement . . . . . . . . . . . . . 14
Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Repair Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 22
Graco Information . . . . . . . . . . . . . . . . . . . . . . . . . 22
™
PPS™ Cup . . . . . . . . . . . 3
2 312579K
Models
Gravity Feed without Cup
Conventional HVLP Compliant
Models
Max.
Orifice
Size
in. (mm)
0.055 (1.4)
0.070 (1.8)
Model Series
289002 A N/A 289005 A 29 (0.2, 2.0) 289008 A 35 (0.24, 2.4)
289003 A N/A 289006 A 29 (0.2, 2.0) 289009 A 35 (0.24, 2.4)
HVLP/Compliant
Air Pressure
psi (MPa, bar)
Model Series
Gravity Feed with Plastic Cup
Conventional HVLP Compliant
Max.
Orifice
Size
in. (mm)
0.055 (1.4)
0.070 (1.8)
Model Series
289011 A N/A 289014 A 29 (0.2, 2.0) 289017 A 35 (0.24, 2.4)
289012 A N/A 289015 A 29 (0.2, 2.0) 289018 A 35 (0.24, 2.4)
Gravity Feed with 3M
HVLP/Compliant
Air Pressure
psi (MPa, bar)
™
PPS™ Cup
Conventional HVLP Compliant
Model Series
Max.
HVLP/Compliant
Air Pressure
psi (MPa, bar)
Max.
HVLP/Compliant
Air Pressure
psi (MPa, bar)
Model Series
Model Series
Max.
HVLP/Compliant
Air Pressure
psi (MPa, bar)
Max.
HVLP/Compliant
Air Pressure
psi (MPa, bar)
Orifice
Size
in. (mm)
0.055 (1.4)
0.070 (1.8)
Max.
HVLP/Compliant
Air Pressure
Model Series
289020 A N/A 289023 A 29 (0.2, 2.0) 289026 A 35 (0.24, 2.4)
289021 A N/A 289024 A 29 (0.2, 2.0) 289027 A 35 (0.24, 2.4)
psi (MPa, bar)
Model Series
Max.
HVLP/Compliant
Air Pressure
psi (MPa, bar)
Model Series
Max.
HVLP/Compliant
Air Pressure
psi (MPa, bar)
312579K 3
Warnings
Warnings
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
symbols refer to procedure-specific risks. Refer back to these warnings. Additional, productspecific 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 lights on or off when flammable fumes
are present.
• Ground all equipment in the work area. See Grounding instructions.
• 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.
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.
EQUIPMENT MISUSE HAZARD
Misuse can cause death or serious injury.
• Do not exceed the maximum working pressure or temperature rating of the lowest
rated system component. See Technical Data in all equipment manuals.
• Use fluids and solvents that are compatible with equipment wetted parts. See
Technical Data in all equipment manuals. Read fluid and solvent manufacturer’s
warnings.
• Check equipment daily. Repair or replace worn or damaged parts immediately.
• Do not alter or modify equipment.
• Use equipment only for its intended purpose. Call your Graco distributor for
information.
• Route hoses and cables away from traffic areas, sharp edges, moving parts, and
hot surfaces.
• Do not kink or overbend hoses or use hoses to pull equipment.
• Keep children and animals away from work area.
• Comply with all applicable safety regulations.
4 312579K
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
Gun Selection
Gun Selection
WARNING
Conventional Guns
Excellent atomization and high production
rates typically with some reduction in transfer
efficiency.
HVLP Guns
An HVLP gun is a high transfer efficiency gun
which 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.
Compliant Guns
A compliant gun is a high transfer efficiency
gun which has been tested to have a transfer
efficiency greater than or equal to HVLP guns.
The Graco compliant guns have no restrictions
on air cap pressures, but the gun inlet pressure must remain under 35 psi (0.24 MPa,
2.4 bar) to remain in compliance.
312579K 5
Setup
Setup
• Check that your shop air provides
adequate air flow. See Technical
Data, page 20, for minimum cfm
requirements.
• Recommended 5/16 in. (7.9 mm) ID
hose, optional 3/8 in. (10 mm) ID air
hose.
• Set shop air pressure regulator (not
supplied) according to paint manufacturer’s recommendation. See
maximum compliant air pressure on
air cap.
• Make sure no air restrictions, such as
low-volume cheater-valves, obstruct
the air flow. If an air adjusting valve is
desired, use a Graco adjustable air
valve (234784).
1. Shut off the air supply.
5. Connect the fluid supply to the fluid inlet
fitting.
fluid inlet
air inlet
ti11306A
FIG. 1
Ground the Gun
Check your local electrical code for detailed
grounding instructions.
2. Install a shutoff valve (not supplied) downstream of the air regulator to shut off gun
air.
3. Install an inline air filter (not supplied) to
clean and dry the gun air supply.
4. Connect a clean, dry, filtered air supply to
the air inlet fitting. See F
IG. 1.
Ground the gun through connection to a
Graco-approved conductive air supply hose.
Flush Before Using Equipment
The equipment was tested with lightweight oil,
which is left in the fluid passages to protect
parts. To avoid contaminating your fluid with
oil, flush the equipment with a compatible solvent before using the equipment. See Flush,
page 9.
6 312579K
Setup
Adjust Spray Pattern
1. Rotate the air cap to achieve desired spray
pattern. See FIG. 2.
ti4839a
FIG. 2
2. To achieve full fan pattern, open the air
control valve by turning the knob fully counterclockwise. See FIG. 3.
3. To create a round pattern, turn the pattern
air off by turning the air control valve fully
clockwise. See FIG. 3.
6. To reduce fluid flow, turn the fluid control
valve clockwise.
• If the fluid control valve is turned clockwise all the way, the gun will emit only
air.
• If you cannot achieve the correct fluid
flow with the fluid control valve, a different sized nozzle may be necessary. For
smaller fluid flow, use the next size
smaller nozzle. For a larger fluid flow,
use the next size larger nozzle.
7. Spray a test pattern. Evaluate the spray
pattern size and atomization.
8. To achieve a narrow spray pattern, turn air
control valve clockwise.
9. To improve atomization, reduce the fluid
flow rate. Increasing the air pressure can
improve atomization but may result in poor
Transfer Efficiency (TE) or non-compliant
operation.
4. Trigger gun and adjust gun air pressure.
Refer to Technical Data, page 20, for inlet
air pressure.
5. To establish the correct fluid flow, turn the
fluid control valve counterclockwise until no
restriction of the trigger movement is felt,
then turn out another half turn.
air control valve
fluid control valve
air inlet valve
ti11097a
F
IG. 3
312579K 7
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