Graco Delta Spray 7031A Operation manual

Instructions – Parts List
GRACO INC.ąP.O. BOX 1441ąMINNEAPOLIS, MNą55440-1441
Copyright 2002, Graco Inc. is registered to I.S. EN ISO 9001
Delta SpraytAir Spray Gun
100 psi (0.7 MPa, 7 bar) Maximum Working Fluid Pressure
100 psi (0.7 MPa, 7 bar) Maximum Working Air Pressure
U.S. Patent 6,019,293
Taiwan Patent 199585
308742 Rev.M
Read warnings and instructions.
7013A
7597A
Table of Contents
Symbols 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warnings 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selection Charts 4. . . . . . . . . . . . . . . . . . . . . . . . . .
Air Flow Charts 6. . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical Installation 7. . . . . . . . . . . . . . . . . . . . . . . . .
Setup 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Daily Gun Care, Flushing, and Cleaning 13. . . . .
Troubleshooting 17. . . . . . . . . . . . . . . . . . . . . . . . . .
Service 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessories 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensions 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Data 29. . . . . . . . . . . . . . . . . . . . . . . . . . .
Graco Standard Warranty 32. . . . . . . . . . . . . . . . .
Graco Information 32. . . . . . . . . . . . . . . . . . . . . . . .
Parts

2 308742
Symbols
Warning Symbol
WARNING
This symbol alerts you to the possibility of serious
injury or death if you do not follow the instructions.
Caution Symbol
CAUTION
This symbol alerts you to the possibility of damage to
or destruction of equipment if you do not follow the
instructions.
WARNING
INSTRUCTIONS
EQUIPMENT MISUSE HAZARD
Equipment misuse can cause the equipment to rupture, malfunction or start unexpectedly and result in
serious injury.
DThis equipment is for professional use only.
DRead all instruction manuals, tags, and labels before operating the equipment.
DUse the equipment only for its intended purpose. If you are uncertain about usage, call your Graco
distributor.
DDo not alter or modify this equipment. Use only genuine Graco parts and accessories.
DCheck equipment daily. Repair or replace worn or damaged parts immediately.
DUse this equipment only in low pressure, air spray systems.
DDo not exceed the maximum working pressure of the lowest rated system component. This equip-
ment has a 100 psi (0.7 MPa, 7 bar) maximum working fluid and air pressure.
DRoute the hoses away from the traffic areas, sharp edges, moving parts, and hot surfaces. Do not
expose Graco hoses to temperatures above 180_F (82_C) or below –40_F (–40_C).
DWear hearing protection when operating this equipment.
DUse fluids or solvents that are compatible with equipment wetted parts. See the Technical Data
section of all equipment manuals. Read the fluid and solvent manufacturer’s warnings.
DMethylene Chloride with formic or propionic acid is not recommended as a flushing or cleaning
solvent with this gun or any other device with nylon or aluminum components as it can damage
these parts.
DComply with all applicable local, state and national fire, electrical and other safety regulations.

308742 3
WARNING
PRESSURIZED EQUIPMENT HAZARD
Spray from the gun, hose leaks or ruptured components can splash fluid in the eyes or on the skin and
cause serious injury.
DDo not stop or deflect fluid leaks with your hand, body, glove or rag.
DFollow the Pressure Relief Procedure on page 13 when: you are instructed to relieve pressure;
stop spraying; clean, check or service the equipment; and install or clean fluid nozzles.
DDo not point the spray gun at anyone or at any part of the body.
DTighten all fluid connections before operating the equipment.
DCheck the hoses, tubes and couplings daily. Replace worn, damaged or loose parts immediately.
Permanently coupled hoses cannot be repaired; replace the entire hose.
FIRE AND EXPLOSION HAZARD
Poor air ventilation, open flames, or sparks can cause a hazardous condition and result in fire or
explosion and serious injury.
DProvide fresh air ventilation to avoid the buildup of flammable fumes from solvent or the fluid being
sprayed.
DExtinguish all open flames or pilot lights in the spray area.
DElectrically disconnect all equipment in the spray area.
DKeep the spray area free of debris, including solvent, rags and gasoline.
DDo not turn on or off any light switch in the spray area while operating or if fumes are present.
DDo not smoke in the spray area.
DDo not operate a gasoline engine in the spray area.
TOXIC FLUID HAZARD
Hazardous fluids or toxic fumes can cause serious injury or death if splashed in the eyes or on the
skin, inhaled, or swallowed.
DKnow the specific hazards of the fluid you are using. Read the fluid manufacturer’s warnings.
DStore hazardous fluid in an approved container. Dispose of hazardous fluid according to all local,
state and national guidelines.
DDress appropriately for your application. Wear the appropriate protective clothing, gloves, eyewear,
and respirator.

4 308742
Selection Charts
TERMS:
Light Fluid: Up to 18 seconds with No. 2 Zahn cup (20 centipoise)
Medium Fluid: 19 to 28 seconds with No. 2 Zahn cup (20–64 centipoise)
Heavy Fluid: Greater than 28 seconds with No. 2 Zahn cup (greater than 64 centipoise) --
2.8 Volatile Organic Compounds, High-solid Polyurethanes, Heavy Waterborne Enamels
NOTE: See pages 24–27 for further part number information.
Air Spray Gun Assemblies
Pressure Feed Guns
Gun Assy. Includes:
Needle/
Nozzle Kit
Air Cap** Orifice
Size
Pattern
Length{
Material Usage:
Part No. Part No. Part No. Type
in. (mm) in. (mm)
Viscosity Flow
oz./min. (l/min.)
239540 239590 192315 pressure 0.030 (0.762) 15 (381) light 4–12 (0.12–0.36)
239541 239591 192315 pressure 0.042 (1.067) 17 (432) light-medium 8–20 (0.24–0.60)
239542 239592 192315 pressure 0.055 (1.397) 17 (432) medium 16–30 (0.48–0.90)
239543 239593 192315 pressure 0.070 (1.778) 18 (457) medium-
heavy
16–35 (0.48–1.05)
239544 239594 192318 pressure 0.086 (2.184) 13 (330) heavy 16–40 (0.48–1.20)
239545 239595 192319 pressure 0.110 (2.790) 11 (279) heavy 16–45 (0.48–1.35)
239548* 239596* 192315 pressure 0.042 (1.067) 17 (432) light-medium 8–20 (0.24–0.60)
239549* 239597* 192315 pressure 0.055 (1.397) 17 (432) medium 16–30 (0.48–0.90)
243522* 239588* 192315 pressure 0.070 (1.778) 18 (457) medium–
heavy
16–35 (0.48–1.05)
Siphon Feed Guns
Gun Assy. Includes:
Needle/
Nozzle Kit
Air Cap** Orifice
Size
Pattern
Length{
Material Usage:
Part No. Part No. Part No. Type
in. (mm) in. (mm)
Viscosity Flow
oz./min. (l/min.)
239546 239592 192317 siphon 0.055 (1.397) 10 (254) light 4–10 (0.12–0.30)
239547 239593 192317 siphon 0.070 (1.778) 10 (254) light-medium 8–12 (0.24–0.36)
* Stainless steel needle/tip
** Large pattern air caps can be replaced with optional air caps for alternate spray patterns. See page 6 for part numbers.
{Measured with gun nozzle 10 in. (254 mm) from target surface

308742 5
Selection Charts
Gravity Feed Guns
Gun Assy. Includes:
Needle/
Nozzle Kit
Air Cap** Orifice
Size
Pattern
Length{
Material Usage:
Part No. Part No. Part No. Type
in. (mm) in. (mm)
Viscosity Flow
oz./min. (l/min.)
239710 239592 192317 gravity 0.055 (1.397) 9 (229) light-medium 4–10 (0.12–0.30)
239711 239593 192317 gravity 0.070 (1.778) 9 (229) light-medium 8–12 (0.24–0.36)
* Stainless steel needle/tip
** Large pattern air caps can be replaced with optional air caps for alternate spray patterns. See page 6 for part numbers.
{Measured with gun nozzle 10 in. (254 mm) from target surface
Spattering or Specking Guns
Gun Assy. Includes:
Needle/
Nozzle Kit
Air Cap** Orifice
Size
Pattern
Length{
Material Usage:
Part No. Part No. Part No. Type
in. (mm) in. (mm)
Viscosity Flow
oz./min. (l/min.)
243640 243542 196109 Spattering
Specking
0.042 (1.067) N/A light-medium 8–20 (0.24–0.60)
Selecting the Proper Needle/Nozzle Kit
The spray gun’s needle/nozzle kits range in size to
provide different fluid flow rates.
As a general guideline, use the fluid nozzle that will
give the required flow with the needle fully triggered at
the lowest fluid pressure.
For high flow rates or high viscosity fluid, select the
larger nozzle sizes.
For low flow rates or light viscosity fluid, select the
smaller nozzle sizes.
NOTE:
DTo help select the proper needle/nozzle size, a fluid
pressure gauge may be connected temporarily to
the gun fluid inlet to determine the fluid pressure.
See Accessories, page 30.
DSee page 18 for troubleshooting information.

6 308742
Selection Charts
Air Spray Gun and Siphon Cup Assemblies
Gun and Cup
Includes:
Gun and Cup
Assy. Part No. Gun Part No. Cup Part No.
1 qt. (0.95 liter)
239551 239546 239582
239552 239547 239582
Air Spray Gun and Gravity Cup Assemblies
Gun and Cup
Includes:
Gun and Cup
Assy. Part No. Gun Part No. Cup Part No.
16 oz. (474 cc)
239555 239710 239714
239556 239711 239714
Optional Air Spray Air Caps
Air Cap
Part No.
Pattern Type Pattern
Length{
in. (mm)
192313 small pattern 12 (305)
192316 medium pattern 14 (356)
192314 low pressure 14 (356)
196106* large pattern 17 (432)
{Measured with gun nozzle 10 in. (254 mm) from surface
* Plated brass air cap

308742 7
Air Flow Charts
NOTE: All tests were completed with the 0.055 in. (1.397 mm) nozzle and the pattern adjustment valve fully open.
Standard Large Pattern Air Cap
Part No. 192315
0
5
10
15
20
25
30
10 20 30 40 50 60 70 80 90
AIR FLOW (scfm)
GUN INLET PRESSURE (psi)
Optional Small Pattern Air Cap
Part No. 192313
0
5
10
15
20
25
30
10 20 30 40 50 60 70 80 90
AIR FLOW (scfm)
GUN INLET PRESSURE (psi)
Optional Medium Pattern Air Cap
Part No. 192316
0
5
10
15
20
25
30
10 20 30 40 50 60 70 80 90
AIR FLOW (scfm)
GUN INLET PRESSURE (psi)
Optional Low Pressure Air Cap
Part No. 192314
0
5
10
15
20
25
30
10 20 30 40 50 60 70 80 90
AIR FLOW (scfm)
GUN INLET PRESSURE (psi)
Optional Gravity/Siphon Air Cap
Part No. 192317
0
5
10
15
20
25
30
10 20 30 40 50 60 70 80 90
AIR FLOW (scfm)
GUN INLET PRESSURE (psi)

8 308742
Typical Installation
KEY
A Delta Spray Gun
See page 4 for gun part numbers.
B Fluid Inlet; 3/8 npsm (R3/8–19)
C Air Swivel Inlet; 1/4 npsm (R1/4–19)
D Air Hose
Recommend 5/16” (7.9 mm) I.D. hose
E Air Shut-off Valve
F Air Regulator
G Air Filter
H Air Supply Line
A
B
C
D
EF G H
07600A
The Delta Spray air spray gun was designed to pro-
duce the highest quality finish with today’s fluids as
well as the Low V.O.C. (volatile organic compound)
fluids of tomorrow.
This spray gun can spray all coatings or finishes
currently being used for automotive, industrial, aero-
space, marine, wood, plastic and architectural applica-
tions, while easily operating from any paint delivery
system, including cups, pressure pots, or remote
pumps for production line operation.
The air regulator must have a minimum air flow
capacity of 20 scfm at 100 psi (0.7 MPa, 7 bar) air
pressure. Refer to the Pressure Drop Charts, page
12.
Ventilate the Spray Booth
WARNING
To prevent hazardous concentrations of
toxic and/or flammable vapors, spray
only in a properly ventilated spray booth.
Do not operate the spray gun unless
ventilation fans are operating.
Check and follow all of the National,
State and Local codes regarding air ex-
haust velocity requirements.
Check and follow all local safety and fire codes.

308742 9
Setup
1. Connect the Air Line
NOTE:
DYou must install an air pressure regulator (F) on the
gun air line to control air pressure to the gun. See
Fig. 2.
DIf your regulated air source does not have a filter,
install an air filter (G) on the 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. 2.
DUse a 5/16 inch (7.9 mm) I.D. air hose to minimize
excessive pressure drop in the hose. See the
Pressure Drop Chart on page 12.
DIf a 1/4 inch (6.35 mm) I.D. air hose is preferred for
flexibility, see the Pressure Drop Chart on page 12
to help set the necessary gun air pressure.
A. Connect the air hose (D) to the 1/4 npsm gun air
inlet (C).
D
C
Fig. 1 7014A
B. Connect the other end of the air hose (D) to a reg-
ulated air supply line (H).
NOTE: Fig. 2 shows the filter (G) air regulator (F),
and air shut-off valve (E) on the air supply line.
01990
D
FG
Fig. 2
H
E
2. Connect the Fluid Hose
NOTE:
DBefore connecting the fluid line, blow it out with air
and flush it with solvent. Use solvent which is
compatible with the fluid to be sprayed.
DInstall a fluid regulator (L) on the fluid line to control
fluid pressure to the gun. See Fig. 4.
DFilter the fluid line of coarse particles and sediment
to avoid clogging the fluid nozzle and causing
finishing defects.
A. Connect the fluid hose (J) to the gun fluid inlet (B)
3/8–18 npsm [R 3/8–19] compound thread.
J
B
Fig. 3 7015A
B. Connect the other end of the fluid hose (J) to a
regulated fluid supply line (K).
NOTE: Fig. 4 shows the fluid regulator (L) and
fluid shut-off valve (M) on the fluid supply line (K).
J
L
Fig. 4
K
M
7016A

10 308742
Setup
3. Flush the Spray Gun.
Before putting any paint through the spray gun, flush
the gun out with a solvent that is compatible with the
fluid to be sprayed, using the lowest possible fluid
pressure and a grounded metal container.
7017A
Fig. 5
WARNING
PRESSURIZED EQUIPMENT HAZARD
To reduce the risk of a serious injury whenever you
are instructed to relieve pressure, follow the Pres-
sure Relief Procedure on page 13.
4. Relieve the Pressure.
5. Position the Air Cap
Rotate the air cap as needed to achieve the desired
spray pattern direction. To create a round pattern, turn
the pattern air off by turning the pattern adjustment
knob (13a) fully clockwise. Refer to Fig. 12, page 12.
Vertical Pattern
Horizontal Pattern
Fig. 6 02020
6. Adjust the Spray Pattern
WARNING
COMPONENT RUPTURE HAZARD
Do not exceed the 100 psi (0.7 MPa,
7 bar) maximum fluid and air pres-
sure of this gun. Higher pressures can cause parts
to rupture and result in serious injury.
Follow these steps to establish the correct fluid flow
and air flow:
A. Turn the fluid adjustment knob (21) counterclock-
wise until no restriction of the trigger movement is
felt, then turn out another half turn. When the knob
is turned far enough, the trigger should be able to
touch the gun handle when the gun is triggered.
7018
A
Fig. 7
21
open