Graco 309550U User Manual
Instructions - Parts
309550U
Plural Component, Impingement Mix
Air Purge Spray Gun
For use with non-flammable foam and polyurea.
Not for use in explosive atmospheres.
3500 psi (24.5 MPa, 245 bar) Maximum Fluid Working Pressure
80-130 psi (0.56-0.9 MPa, 5.6-9.0 bar) Air Inlet Pressure Range
200°F (94°C) Maximum Fluid Temperature
Important Safety Instructions
Read all warnings and instructions in this manual.
Save these instructions.
US Patent Number D479,305
Korean Patent 338185
Australian Patent Number 152610
Graco Inc. P.O. Box 1441 Minneapolis, MN 55440-1441
Copyright 2002, Graco Inc. is registered to I.S. EN ISO 9001
TI2408-1A
Manual Conventions
Contents
Manual Conventions . . . . . . . . . . . . . . . . . . . . . . . . 2
List of Models/Mix Chamber Selection Guide . . . . 3
Round Pattern Guns . . . . . . . . . . . . . . . . . . . . . . 3
Flat Pattern Guns . . . . . . . . . . . . . . . . . . . . . . . . 4
Flat Pattern Stud Wall Gun . . . . . . . . . . . . . . . . . 5
Spatter Pattern Gun . . . . . . . . . . . . . . . . . . . . . . 6
Wide Round Pattern Gun . . . . . . . . . . . . . . . . . . 6
Four-Hose Gun . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Non 1:1 Ratio Guns . . . . . . . . . . . . . . . . . . . . . . 6
Overall View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Isocyanate Hazard . . . . . . . . . . . . . . . . . . . . . . . . . 10
Keep A and B Components Separate . . . . . . . . . 10
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Piston Safety Lock . . . . . . . . . . . . . . . . . . . . . . . . 10
Turning Air Cap . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Loss of Air Pressure . . . . . . . . . . . . . . . . . . . . . . . 11
Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Pressure Relief Procedure . . . . . . . . . . . . . . . . . . 15
Optional Configurations . . . . . . . . . . . . . . . . . . . . 16
Optional Fluid Manifold Position . . . . . . . . . . . . 16
Optional Hose Position . . . . . . . . . . . . . . . . . . . 17
Flat Spray Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Supplied Tool Kit . . . . . . . . . . . . . . . . . . . . . . . . 19
Keep Gun Clean . . . . . . . . . . . . . . . . . . . . . . . . 19
As Needed . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Daily . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Weekly to Monthly . . . . . . . . . . . . . . . . . . . . . . . 19
Flush Gun . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Clean Outside of Gun . . . . . . . . . . . . . . . . . . . . 20
Clean Air Cap . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Clean Muffler . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Clean Fluid Manifold . . . . . . . . . . . . . . . . . . . . . 20
Clean Mix Chamber Nozzle . . . . . . . . . . . . . . . . 21
Clean Passages . . . . . . . . . . . . . . . . . . . . . . . . 21
Clean Impingement Ports . . . . . . . . . . . . . . . . . 21
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Remove Front End . . . . . . . . . . . . . . . . . . . . . . . 27
Attach Front End . . . . . . . . . . . . . . . . . . . . . . . . 28
Mix Chamber and Side Seal Cartridges . . . . . . 29
Check Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Piston . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Piston Safety Lock . . . . . . . . . . . . . . . . . . . . . . . 33
Air Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Mix Chamber Kits . . . . . . . . . . . . . . . . . . . . . . . 37
Flat Tip Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Gun Repair Kits . . . . . . . . . . . . . . . . . . . . . . . . . 38
Check Valve Filter Screen Kits . . . . . . . . . . . . . 38
Drill Bit Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Air Purge Handle Cleanout Drill Kit . . . . . . . . . . 40
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 46
Graco Information . . . . . . . . . . . . . . . . . . . . . . . . . 46
Manual Conventions
Warning Caution
WAR NING
A caution alerts you to possible equipment damage or
destruction if you do not follow instructions.
A warning alerts you to possible serious injury or
death if you do not follow instructions.
Symbols, such as fluid injection (shown), alert you to a
specific hazard and direct you to read the indicated
hazard warnings on pages 7-8.
2 309550U
Note
A note indicates additional helpful information.
CAUTION
List of Models/Mix Chamber Selection Guide
List of Models/Mix Chamber Selection Guide
Round Pattern Guns
Mix Chamber
Impingement
Gun Part
No., Series Part No.
246099, A AR2020 .020 (0.50) -000 SST
246100, A AR2929 .029 (0.70) -00 SST
248617, A AR3737 .037 (0.94) None SST
246101, A AR4242 .042 (1.00) -01 SST
246102, A AR5252 .052 (1.30) -02 SST
246103, A AR6060 .060 (1.50) -03 SST
Port Size
in. (mm)
Equivalent
Size
Seal
Material
246104, A AR7070 .070 (1.75) -04 SST
246105, A AR8686 .086 (2.15) -05 SST
255201, A AR4242 .042 (1.00) -01 Polycarballoy
255202, A AR5252 .052 (1.30) -02 Polycarballoy
5.0
(18.9)
4.0
(15.1)
3.0
(11.4)
2.0
(7.6)
1.0
(3.8)
(
6
8
6
8
R
A
2
8
2
8
W
A
)
5
0
(
0
7
0
7
R
A
4
6
4
6
W
A
)
4
0
0
(
0
6
0
6
R
A
2
5
2
5
R
A
4
AR
5
7
5
W
A
)
3
4
W
A
,
)
2
0
(
,
)
1
0
(
2
4
2
7
3
7
3
R
A
9
2
9
2
R
A
(
0
2
0
2
R
A
FLOW RATE in gpm (lpm)*
* To calculate flow in lb/min, multiply gpm rate by 10.
Example: 2 gpm x 10 = 20 lb/min.
0
500
(3.5, 35)
1000
(6.9, 69)
1500
(10.3, 103)
2000
(13.8, 138)
2500
(17.4, 172.4)
(20.7, 207)
PRESSURE in psi (MPa, bar)
7
4
6
AW3
A
,
0
0
(
0
0
3000
*
6
*
9
3
9
*
3
3
3
3
W
A
,
)
)
0
2
W
*
8
2
8
3500
(24.1, 241)
*Accessory AW (wide pattern) mix chambers are available. See page 41.
309550U 3
List of Models/Mix Chamber Selection Guide
Flat Pattern Guns
Mix Chamber Flat Tip
Impingement
Gun Part
No., Series Part No.
247101, A AF2020 .020 (0.50) -000 FT0424 8-10 (203-254) .024 (0.61)
247102, A AF2020 .020 (0.50) -000 FT0438 8-10 (203-254) .038 (0.97)
247103, A AF2020 .020 (0.50) -000 FT0624 12-14 (305-356) .024 (0.61)
247104, A AF2020 .020 (0.50) -000 FT0638 12-14 (305-356) .038 (0.97)
247107, A AF2020 .020 (0.50) -000 FT0838 16-18 (406-457) .038 (0.97)
247108, A AF2020 .020 (0.50) -000 FT0848 16-18 (406-457) .048 (1.22)
247111, A AF2929 .029 (0.70) -00 FT0424 8-10 (203-254) .024 (0.61)
247112, A AF2929 .029 (0.70) -00 FT0438 8-10 (203-254) .038 (0.97)
247113, A AF2929 .029 (0.70) -00 FT0624 12-14 (305-356) .024 (0.61)
Port Size
in. (mm)
Equivalent
Size Part No.
Pattern Size
in. (mm)
Orifice Size
in. (mm)
247114, A AF2929 .029 (0.70) -00 FT0638 12-14 (305-356) .038 (0.97)
247117, A AF2929 .029 (0.70) -00 FT0838 16-18 (406-457) .038 (0.97)
247118, A AF2929 .029 (0.70) -00 FT0848 16-18 (406-457) .048 (1.22)
247121, A AF4242 .042 (1.00) -01 FT0424 8-10 (203-254) .024 (0.61)
247122, A AF4242 .042 (1.00) -01 FT0438 8-10 (203-254) .038 (0.97)
247123, A AF4242 .042 (1.00) -01 FT0624 12-14 (305-356) .024 (0.61)
247124, A AF4242 .042 (1.00) -01 FT0638 12-14 (305-356) .038 (0.97)
247127, A AF4242 .042 (1.00) -01 FT0838 16-18 (406-457) .038 (0.97)
247128, A AF4242 .042 (1.00) -01 FT0848 16-18 (406-457) .048 (1.22)
247131, A AF5252 .052 (1.30) -02 FT0424 8-10 (203-254) .024 (0.61)
247132, A AF5252 .052 (1.30) -02 FT0438 8-10 (203-254) .038 (0.97)
247133, A AF5252 .052 (1.30) -02 FT0624 12-14 (305-356) .024 (0.61)
247134, A AF5252 .052 (1.30) -02 FT0638 12-14 (305-356) .038 (0.97)
247137, A AF5252 .052 (1.30) -02 FT0838 16-18 (406-457) .038 (0.97)
247138, A AF5252 .052 (1.30) -02 FT0848 16-18 (406-457) .048 (1.22)
4 309550U
Flat Pattern Guns, continued
3.0
(11.4)
2.25
(8.55)
1.5
(5.7)
0.75
(2.85)
FLOW RATE in gpm (lpm)*
* To calculate flow in lb/min, multiply gpm rate by 10.
Example: 2 gpm x 10 = 20 lb/min.
0
500
(3.5, 35)
1000
(6.9, 69)
1500
(10.3, 103)
PRESSURE in psi (MPa, bar)
2000
(13.8, 138)
List of Models/Mix Chamber Selection Guide
2
5
F
A
F
A
F
A
F
A
2500
(17.4, 172.4)
w
2
5
2
4
2
4
2
9
2
0
2
0
2
4
X
X
T
F
h
t
i
X
T
F
h
t
i
w
T
F
h
t
i
w
9
X
T
F
h
t
i
w
3000
(20.7, 207)
p
i
t
8
8
3
X
3
X
X
4
2
X
p
i
t
p
i
t
8
p
i
t
3500
(24.1, 241)
Flat Pattern Stud Wall Gun
See manual number 311071 for more information.
Mix Chamber Flat Tip Flow Data
Impingement
Gun Part
No., Series Part No.
Port Size
in. (mm)
Equivalent
Size Part No.
249525 AF4242 .042 (1.00) -01 FTM979 22 (559) .038 (0.97) 11 lb/min
249526 AF5252 .052 (1.30) -02 FTM979 22 (559) .038 (0.97) 15 lb/min
Pattern Dia. at
24 in. (610 mm)
to Target
in. (mm)
Orifice Size
in. (mm)
Approximate
Flow Rate at
1000 psi
(7.0 MPa, 70 bar)
(4.99 kg/min)
(6.81 kg.min)
309550U 5
List of Models/Mix Chamber Selection Guide
Spatter Pattern Gun
Mix Chamber
Impingement
Gun Part
No., Series Part No.
248408 A AR7070 .070 (1.75) -04
Port Size
in. (mm)
Equivalent
Size
Wide Round Pattern Gun
Mix Chamber
Impingement
Gun Part
No., Series Part No.
249529 AW3939 .039 (0.99) -01 16 (406.4) AR4242
249530 AW4646 .046 (1.17) -02 18 (457.2) AR5252
Port Size
in. (mm)
Equivalent
Size
Pattern Diameter at
24 in. (610 mm) to
Targe t
in. (mm)
Equivalent Flow to
Mix Chamber Size
Reference Part No.
Four-Hose Gun
Wide Round Pattern Gun with Four-Hose Recirculating Gun Manifold
Mix Chamber
Impingement
Gun Part
No., Series Part No.
249810 AW2222 .022 (0.56) NA
Port Size
in. (mm)
Equivalent
Size
Pattern Diameter at
24 in. (610 mm) to
Targe t
in. (mm)
8-9 (203-229)
Non 1:1 Ratio Guns
Gun Part
No., Series
253888 AR2232
Mix
Chamber
Approximate Flow
Rate at 1000 psi
(7.0 MPa, 70 bar)
4.5 lb/min
(204 kg/min)
6 309550U
Warning
WARNING
PERSONAL PROTECTIVE EQUIPMENT
You must wear proper 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.
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 Material Safety Data Sheet (MSDS) 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.
SKIN INJECTION HAZARD
High-pressure fluid from gun, hose leaks, or ruptured components will pierce skin. This may look like just
a cut, but it is a serious injury that can result in amputation. Get immediate surgical treatment.
• Do not point the gun at anyone or at any part of the body.
• Do not put your hand or fingers over the gun fluid nozzle.
• Do not stop or deflect leaks with your hand, body, glove, or rag.
• Do not “blow back” fluid; this is not an air spray system.
• Follow Pressure Relief Procedure, page 15, when you stop spraying and before cleaning, check-
ing, or servicing equipment.
• Use lowest possible pressure when flushing, priming, or troubleshooting.
• Engage piston safety lock when not spraying.
• Tighten all fluid connections before operating the equipment.
• Check hoses, tubes, and couplings daily. Replace worn or damaged parts immediately. High pressure hose cannot be recoupled; replace the entire hose.
BURN HAZARD
Equipment surfaces and fluid that’s heated can become very hot during operation. To avoid severe
burns, do not touch hot fluid or equipment. Wait until equipment/fluid has cooled completely.
309550U 7
Warning
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).
• Do not plug or unplug power cords or turn lights on or off when flammable fumes are present.
• Keep the work area free of debris, including solvent, rags, and gasoline.
• Ground equipment and conductive objects. See Grounding, page 10.
• Hold gun firmly to side of grounded pail when triggering into pail.
• Use only grounded hoses.
• If there is static sparking or you feel a shock, stop operation immediately. Do not use equipment
until you identify and correct the problem.
EQUIPMENT MISUSE HAZARD
Misuse can cause serious injury or death.
• For professional use only.
• Use equipment only for its intended purpose. Call your Graco distributor for information.
• Read manuals, warnings, tags, and labels before operating equipment. Follow instructions.
• Check equipment daily. Repair or replace worn or damaged parts immediately.
• Do not alter or modify equipment. Use only Graco parts and accessories.
• 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.
• Route hoses and cables away from traffic areas, sharp edges, moving parts, and hot surfaces.
• Do not use hoses to pull equipment.
• Comply with all applicable safety regulations.
PRESSURIZED ALUMINUM PARTS HAZARD
Do not use 1,1,1-trichloroethane, methylene chloride, other halogenated hydrocarbon solvents or fluids
containing such solvents in pressurized aluminum equipment. Such use can cause serious chemical
reaction and equipment rupture, and result in death, serious injury, and property damage.
8 309550U
Overall View
Overall View
KL
FG
R
U
D
N
V
C
P
B
M
A
T
S
H
W
E
J
TI2408A
Key:
A A Side Fluid Valve (ISO)
B B Side Fluid Valve (RESIN)
C Air Cap
D Air Line Quick Coupler
EMuffler
F Fluid Housing
G Grease Fitting (under cap)
H Handle
J Optional Air Inlet
K Cleanoff Air Valve
L Piston Safety Lock
M Gun Fluid Manifold
N Mix Chamber Nozzle
P Optional Fluid Inlets (A Side Shown)
R Lock Ring
S Fluid Inlet Swivels (A Side Shown)
T Trigger
U Front Retaining Ring
V Gun Air Whip Hose
WAir Valve
309550U 9
Isocyanate Hazard
Isocyanate Hazard
WARNING
Read Material Safety Data Sheet (MSDS) to know the
specific hazards of isocyanates. Use equipment in a
well-ventilated area. Wear respirator, gloves, and protective clothing when using isocyanates.
Keep A and B Components Separate
CAUTION
To prevent cross-contamination of the gun’s wetted
parts, do not interchange A component (isocyanate)
and B component (resin) parts. The gun is shipped
with the A side on the left. The fluid manifold, fluid
housing, side seal cartridge, check valve cartridge,
and mix chamber are marked on the A side.
Piston Safety Lock
Engage piston safety lock whenever you stop spraying, to avoid accidental triggering.
WARNING
Read warnings, page 7.
To engage piston safety lock: push knob in and turn
clockwise. If engaged, gun will not actuate.
Engaged
TI2409A
To disengage piston safety lock: push knob in and
turn counterclockwise until it pops out. There will be a
gap between knob and gun body.
Grounding
WARNING
Read warnings, page 8.
Check your local electrical code and proportioner manual for detailed grounding instructions.
Ground the spray gun through connection to a
Graco-approved grounded fluid supply hose.
Disengaged
TI2410A
10 309550U
Turning Air Cap
Turning Air Cap Loss of Air Pressure
WARNING
Read warnings, page 7.
1. Follow Pressure Relief Procedure, page 15.
2. Close fluid valves A and B before turning air cap
(C).
C
B
In event of loss of air pressure, gun will continue to
spray. To shut off gun, do one of the following:
• Push in piston safety lock, see page 10.
• Close fluid valves A and B.
B
TI2421A
A
TI2421A
A
309550U 11
Setup
Setup
1. Close fluid valves A and B.
TI2411A
2. Connect A (ISO) and B (RESIN) fluid hoses to fluid
manifold.
B (RESIN)
A (ISO)
TI2417A
To change position of fluid manifold or use
optional fluid inlets, see pages 16 and 17.
5. Connect quick coupler (D). Turn on air. Open air
valve (W*). Air should flow from nozzle (N).
N
D
To use optional air inlet, see page 17.
W*
TI2414-1A
6. Disengage piston safety lock, page 10.
3. Engage piston safety lock, page 10.
TI2409A
4. Connect gun air whip hose (V) and air valve (W*)
to main air hose. Attach fluid manifold (M) to gun.
M
W*
V
TI2554A
TI2410A
7. Trigger gun to check for full mix chamber travel.
Front of air cap (C) should be approximately flush
with front retaining ring (U).
U
C
TI2414-1A
* (W) Not included with spatter gun.
12 309550U
Setup
8. Open cleanoff air valve (K) 1/4-1/2 turn and trigger
gun to check that cleanoff air is flowing. Adjust as
desired.This step does not apply with spatter spray
gun 248408.
K
TI2413A
9. Engage piston safety lock, page 10.
TI2409A
10. Turn on proportioner.
11. Open B (RESIN) fluid valve (about three half
turns). Then open A (ISO) fluid valve.
12. Disengage piston safety lock, page 10.
TI2410A
13. Test spray onto cardboard. Adjust pressure and
temperature to get desired results.
TI2645A
14. Apply layer of lubricant over front of gun and
lock ring, or use gun cover to prevent overspray
buildup and ease disassembly. See page 43 to
order lubricant and gun cover.
15. Gun is ready to spray.
CAUTION
Air supply is required for gun actuation. Do not disconnect gun air supply until fluid pressure is relieved,
page 15.
TI2414A
309550U 13
Shutdown
Shutdown
For overnight shutdown:
1. Follow Pressure Relief Procedure, page 15.
3. Remove grease fitting cap. Using grease gun (Y),
dispense grease into fitting (G) until grease mist
sprays from mix chamber nozzle (N). Do not
over-grease; use 2 shots maximum. Do not spray
grease mist on sprayed material.
2. Leave air turned on and gun detriggered.
Grease gun daily to prevent 2 component curing
and keep fluid passages clean. Purge air carries
grease mist through air chamber (AC), impingement ports (IP), and out mix chamber nozzle (N),
coating all surfaces. Use Graco 117773 Grease,
see page 43.
KEY
Purge Air
Fluid
Cleanoff Air
Grease
G
19
TI3547a
AC
IP
Y
G
N
W
TI2415A
4. Replace grease cap.
5. Round and Flat pattern guns only: Turn off air
valve (W).
Spatter pattern gun only: Shut down main air supply.
N
14 309550U
TI3546a
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