Graco Delta Spray 308741N User manual

Instructions – Parts List
Delta Sprayt
HVLP Spray Gun 308741N
GRACO INC.ąP.O. BOX 1441ąMINNEAPOLIS, MNą55440-1441
Copyright 2001, Graco Inc. is registered to I.S. EN ISO 9001
100 psi (0.7 MPa, 7 bar) Maximum Working Fluid Pressure
100 psi (0.7 MPa, 7 bar) Maximum Working Air Pressure
40 psi (280 kPa, 2.8 bar) Maximum Compliant Inbound Air Pressure
U.S. Patent 6,019,293
Taiwan Patent 199585
Taiwan Patent 199601
Table of Contents
Symbols 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warnings 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selection Charts 4. . . . . . . . . . . . . . . . . . . . . . . .
Air Flow and Atomizing Pressure 6. . . . . . . . . .
Typical Installation 7. . . . . . . . . . . . . . . . . . . . . . .
Setup 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Daily Gun Care, Flushing, and Cleaning 13. . .
Troubleshooting 17. . . . . . . . . . . . . . . . . . . . . . . .
Service 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessories 28. . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensions 30. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Data 30. . . . . . . . . . . . . . . . . . . . . . . . .
Graco Standard Warranty 32. . . . . . . . . . . . . . .
Graco Information 32. . . . . . . . . . . . . . . . . . . . . .
INSTRUCTIONS
This manual contains important warnings
and information.
READ AND KEEP FOR REFERENCE.

2 308741
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.

308741 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 12 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 308741
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.
HVLP 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.)
239559 239600 192321 pressure 0.030 (0.762) 15 (381) light 4–10 (0.12–0.30)
239560 239601 192321 pressure 0.042 (1.067) 16 (406) light-medium 8–14 (0.24–0.42)
239561 239602 192321 pressure 0.055 (1.397) 16 (406) medium 12–18 (0.36–0.54)
239562 239603 192322 pressure 0.070 (1.778) 17 (432) medium-
heavy
16–20 (0.48–0.60)
239563 239604 192322 pressure 0.086 (2.184) 17 (432) heavy 18–22 (0.54–0.66)
239564 239605 192323 pressure 0.110 (2.790) 18 (457) heavy 20–24 (0.60–0.72)
239565* 239606* 192321 pressure 0.042 (1.067) 16 (406) light-medium 8–14 (0.24–0.42)
239566* 239607* 192321 pressure 0.055 (1.397) 16 (406) medium 12–18 (0.36–0.54)
239567* 239598 192322 pressure 0.070 (1.778) 17 (432) medium-
heavy
16–20 (0.48–0.60)
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.)
239574 239592 192329 gravity 0.055 (1.397) 14 (356) light-medium 3–5 (0.09–0.15)
239575 239593 192329 gravity 0.070 (1.778) 16 (406) light-medium 4–6 (0.12–0.18)
* Stainless steel needle/tip
{Measured with gun nozzle 10 in. (254 mm) from target surface

308741 5
Selection Charts
HVLP Spray Gun and Pressure Cup
Assemblies
Gun and Cup
Includes:
G
un an
d
C
up
Assy. Part No. Gun Part No. Cup and Reg-
ulator Part No.
1 qt. (0.95 liter)
239568 239560 239802
239569 239561 239802
239570 239562 239802
239571 239563 239802
HVLP Spray Gun and Gravity Cup
Assemblies
Gun and Cup
Includes:
G
un an
d
C
up
Assy. Part No. Gun Part No. Cup Part No.
16 oz. (474 cc)
239579 239574 239714
239580 239575 239714
Optional HVLP Air Caps
Air Cap Part
No.
Pattern Type Pattern
Length†
in. (mm)
196107 Shading/SAP 6 (152)
† measured with gun nozzle 10 in. (254 mm) from
target surface
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 low flow rates or light viscosity fluid, select the
smaller nozzle sizes.
For high flow rates or high viscosity fluid, select the
larger 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 28.
DSee page 17 for troubleshooting information.

6 308741
Air Flow and Atomizing Pressure
NOTE: All tests were completed with the 0.055 in. (1.397 mm) nozzle, large pattern air cap, and the pattern adjust-
ment valve fully open.
Air Flow
0
5
10
15
20
25
30
35
10 20 30 40 50 60 70
AIR FLOW (scfm)
GUN INLET PRESSURE (psi)
Atomizing Air Pressure
(inlet pressure versus atomizing pressure)
0
2
4
6
8
10
12
14
16
18
20
10 20 30 40 50 60 70
GUN INLET PRESSURE (psi)
NOMINAL ATOMIZING PRESSURE (psi)
Gun Inlet Pressure
psi (kPa, bar)
Nominal Atomizing Pressure
psi (kPa, bar)
10 (70, 0.7) 1 (7, 0.1)
20 (140, 1.4) 4 (28, 0.2)
30 (210, 2.1) 7 (48, 0.4)
40 (280, 2.8) 10 (70, 0.7)
50 (345, 3.4) 13 (91, 0.9)
60 (410, 4.1) 16 (111, 1.1)
70 (480, 4.8) 19 (132, 1.3)

308741 7
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) ID hose
Optional 3/8” (9.5 mm) ID 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 HVLP spray gun was designed to
produce 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 most 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 spray gun typically utilizes 40 psi (280 kPa, 2.8
bar) inbound air pressure to produce high quality paint
finishes at 10 psi (70 kPa, 0.7 bar) atomizing air pres-
sure.
The air regulator must have a minimum air flow
capacity of 30 scfm at 100 psi (0.7 MPa, 7 bar) air
pressure. Refer to the Pressure Drop Charts, page
11.
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.

8 308741
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 11 for the expected
pressure drops through a 25 ft. (7.625 m) hose.
A. Connect the air hose (D) to the 1/4 npsm gun air
inlet (C).
D
C
Fig. 1 7033A
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 7034A
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

308741 9
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.
Fig. 5 7035A
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 12.
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 11.
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.
WARNING
PRESSURIZED EQUIPMENT HAZARD
To avoid injury, never open the fluid adjustment
knob (21) beyond the one half turn indicated in
Adjust the Spray Pattern.
Fig. 7
21
open
7036
A

10 308741
Setup
6. Adjust the Spray Pattern (continued)
B. Adjust the fluid flow using the fluid pressure
regulator (L) installed in the gun fluid line. Typical
industrial flow rates will vary with regulator pres-
sures from 5 to 30 psi (34 to 210 kPa, 0.3 to
2.1 bar).
Fig. 8
L
7019A
C. Hold the gun parallel to the floor and adjust the fluid
pressure to yield a 1 to 6 inch (25.4 to 152.4 mm)
straight fluid stream before the stream falls off.
Fig. 9
1–6 in.
(25.4–152.4 mm)
straight fluid stream
7037
A
Fluid Velocity of Fluid Nozzles
at the Same Flow Rate
Fig. 10
0.042
(1.067)
0.055
(1.397)
0.070
(1.778)
0.086
(2.184)
0.110
(2.794)
Orifice Size in inches (mm)
7038A
NOTE: A larger fluid nozzle at a reduced fluid pressure
will maintain the same flow rate, but slow down the
fluid stream (velocity). When air is applied, this allows
the air to act on the fluid longer and improve the atom-
ization.
D. If further fluid flow restriction is needed at the gun,
turn the fluid adjustment knob (21) clockwise to
reduce the volume of fluid output by limiting the
needle travel.
Fig. 11
21
close
7039
A
WARNING
PRESSURIZED EQUIPMENT HAZARD
To avoid injury, never open the fluid adjustment
knob (21) beyond the one half turn indicated in
Adjust the Spray Pattern, page 9.
CAUTION
Restricting the trigger and fluid needle travel by
continuously spraying with the fluid adjustment knob
closed (turned clockwise), will cause accelerated
abrasive wear on the fluid needle and wear on the
trigger/air valve shaft interface.
For the best results, use the gun fluid regulator to
adjust the fluid flow or use a different size needle/
nozzle/air cap combination.