Graco Delta Spray 308741N Manuale utente

Instructions – Parts List

Delta Sprayt

HVLP Spray Gun 308741N

GRACO INC.ąP.O. BOX 1441ąMINNEAPOLIS, MNą55440-1441

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:

un an

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:

un an

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

10 20 30 40 50 60 70

AIR FLOW (scfm)

GUN INLET PRESSURE (psi)

Atomizing Air Pressure

(inlet pressure versus atomizing pressure)

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

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).

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

Fig. 2

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.

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).

Fig. 4

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

open

7036

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

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

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

7039

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.

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