Graco AirPro 312579 User manual

Instructions-Parts

AirPro™Gravity

Feed Airspray Gun 312579H

ENG

Conventional, HVLP, and compliant guns for specialty industrial applications.

For professional use only.

100 psi (0.7 MPa, 7 bar) Maximum Air Inlet Pressure

See page 3 for model information.

Important Safety Instructions

Read all warnings and instructions in

this manual. Save these instructions.

ti11095A

ll 2 G

Related Manuals

2312579H

Contents

Related Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Gravity Feed without Cup . . . . . . . . . . . . . . . . . . 3

Gravity Feed with Plastic Cup . . . . . . . . . . . . . . . 3

Gravity Feed with 3M™PPS™Cup . . . . . . . . . . . 3

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

Related Manuals

Manual Language

313089 Chinese

313091 Dutch

313092 Finnish

313093 French

313094 German

313096 Italian

313097 Japanese

313098 Korean

313100 Portuguese

313101 Russian

313102 Spanish

313103 Swedish

Models

312579H 3

Models

Gravity Feed without Cup

Gravity Feed with Plastic Cup

Gravity Feed with 3M™PPS™Cup

Orifice

Size

in. (mm)

Conventional HVLP Compliant

Model Series

Max.

HVLP/Compliant

Air Pressure

psi (MPa, bar) Model Series

Max.

HVLP/Compliant

Air Pressure

psi (MPa, bar) Model Series

Max.

HVLP/Compliant

Air Pressure

psi (MPa, bar)

0.055 (1.4) 289002 A N/A 289005 A 29 (0.2, 2.0) 289008 A 35 (0.24, 2.4)

0.070 (1.8) 289003 A N/A 289006 A 29 (0.2, 2.0) 289009 A 35 (0.24, 2.4)

Orifice

Size

in. (mm)

Conventional HVLP Compliant

Model Series

Max.

HVLP/Compliant

Air Pressure

psi (MPa, bar) Model Series

Max.

HVLP/Compliant

Air Pressure

psi (MPa, bar) Model Series

Max.

HVLP/Compliant

Air Pressure

psi (MPa, bar)

0.055 (1.4) 289011 A N/A 289014 A 29 (0.2, 2.0) 289017 A 35 (0.24, 2.4)

0.070 (1.8) 289012 A N/A 289015 A 29 (0.2, 2.0) 289018 A 35 (0.24, 2.4)

Orifice

Size

in. (mm)

Conventional HVLP Compliant

Model Series

Max.

HVLP/Compliant

Air Pressure

psi (MPa, bar) Model Series

Max.

HVLP/Compliant

Air Pressure

psi (MPa, bar) Model Series

Max.

HVLP/Compliant

Air Pressure

psi (MPa, bar)

0.055 (1.4) 289020 A N/A 289023 A 29 (0.2, 2.0) 289026 A 35 (0.24, 2.4)

0.070 (1.8) 289021 A N/A 289024 A 29 (0.2, 2.0) 289027 A 35 (0.24, 2.4)

Warnings

4312579H

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, product-

specific 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.

Gun Selection

312579H 5

Gun Selection

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 pres-

sure must remain under 35 psi (0.24 MPa,

2.4 bar) to remain in compliance.

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

WARNING

Setup

6312579H

Setup

1. Shut off the air supply.

2. Install a shutoff valve (not supplied) down-

stream 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 FIG. 1.

5. Connect the fluid supply to the fluid inlet

fitting.

Ground the Gun

Check your local electrical code for detailed

grounding instructions.

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 sol-

vent before using the equipment. See Flush,

page 9.

• 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 manu-

facturer’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).

FIG. 1

fluid inlet

air inlet

ti11306A

Setup

312579H 7

Adjust Spray Pattern

1. Rotate the air cap to achieve desired spray

pattern. See FIG. 2.

2. To achieve full fan pattern, open the air

control valve by turning the knob fully coun-

terclockwise. 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.

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.

6. To reduce fluid flow, turn the fluid control

valve clockwise.

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.

FIG. 2

FIG. 3

ti4839a

fluid control valve

air control valve

ti11097a

air inlet valve

• If the fluid control valve is turned clock-

wise all the way, the gun will emit only

air.

• If you cannot achieve the correct fluid

flow with the fluid control valve, a differ-

ent 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.

Operation

8312579H

Operation

Pressure Relief Procedure

1. Turn off the gun air supply.

2. Trigger the gun to relieve pressure.

Apply Fluid

1. Fill the cup with material. Do not fill past the

full markings on cup.

2. Turn on the shop air to the gun. Set atomiz-

ing pressure with the gun fully triggered.

3. Adjust the pattern size and shape. See

page 7.

4. To achieve the best results when applying

fluid:

• Keep the gun perpendicular and

6 to 8 inches (150 to 200 mm) from the

object being sprayed.

• Use smooth, parallel strokes across the

surface to be sprayed with 50% overlap.

When using the HVLP spray gun, instead of a

conventional airspray gun, you may need to

use a slightly slower hand movement and

make fewer passes with the gun to coat a part.

This is due to the reduced spray velocity pro-

duced by lower HVLP air pressures, along with

a larger fluid particle size because there is less

air to blow off solvents than is produced by

conventional airspray. Take care to avoid runs

or sags as you spray.

Volatile Organic Compounds

(VOC) Regulation

In certain states, spraying solvents that release

VOCs into the atmosphere when cleaning a

spray gun is prohibited. To comply with these

air quality laws, you must use a cleaning

method that prevents the escape of VOC

vapors into the atmosphere. See Compliant

Cleaning Methods, page 10.

CAUTION

Excessive atomizing air pressure can

increase over-spray, reduce transfer

efficiency, and result in a poor quality finish.

Regulatory agencies in certain states prohibit

the operation of a spray gun above 10 psi

(69 kPa, 0.7 bar) atomizing air cap pressure.

See Troubleshooting, page 11, if you

experience an irregular pattern.

Clean air line filters as directed by the

manufacturer.

Daily Gun Maintenance

312579H 9

Daily Gun Maintenance

General Tasks

Follow the Pressure Relief Procedure,

page 8.

• Frequently lubricate the gun moving

parts with a drop of non-silicone oil.

• Do not disassemble the spray gun if you

are having a spray pattern problem. See

Troubleshooting, page 11, for information

on how to correct the problem.

• Clean the fluid and air line filters daily.

• Check for fluid leakage. Tighten fittings

or replace equipment as needed.

Flush

Flush before using the equipment, before

changing colors, and when you are done

spraying. Use solvent that is compatible with

gun wetted parts and with the fluid that will be

sprayed.

1. Follow Pressure Relief Procedure,

page 8.

2. Dispose of any paint in the cup.

3. Fill the cup with a small amount of solvent.

4. Spray into a grounded metal waste

container until the equipment is clean.

5. Follow Pressure Relief Procedure,

page 8.

Clean Gun and Cup

1. Flush, page 9.

2. Dampen a soft cloth with solvent and wring

out the excess. Point the gun down and

wipe off the outside of the gun and cup.

3. Make sure cup lid vent hole is clear.

4. Blow dry gun inside and out. Lubricate.

CAUTION

Solvent left in gun air passages could result

in a poor quality paint finish. Do not use any

cleaning method that may allow solvent into

the gun air passages.

• Do not point gun up while cleaning it.

• Do not wipe gun with a cloth soaked in

solvent; wring out the excess.

• Do not immerse the gun in solvent.

See Compliant Cleaning Methods,

page 10, to comply with air quality laws if

applicable.

CAUTION

• Do not submerge gun in solvent. Solvent

dissolves lubricant, dries out packings, and

clogs air passages.

• Do not use metal tools to clean air cap

holes as this may scratch them and distort

the spray pattern.

• Use a compatible solvent.

See Compliant Cleaning Methods,

page 10, to comply with air quality laws if

applicable.

Daily Gun Maintenance

10 312579H

Clean Nozzle and Air Cap

1. Remove air cap (13), trigger gun, remove

nozzle (11), and soak both in a compatible

cleaning solution.

2. Clean air cap, nozzle, and front of the gun

with a soft-bristle brush dipped into com-

patible solvent. Do not use a wire brush or

metal tools.

3. Use a soft implement, such as a toothpick,

to clean out air cap holes.

4. Trigger the gun while you install the fluid

nozzle with the gun tool. Tighten the nozzle

securely to 155-165 in-lb (17.5-18.6 N•m)

to obtain a good seal.

5. Install the retaining ring (14) and

air cap (13).

6. After cleaning the gun, lubricate the follow-

ing parts with lubricant 111265 daily:

• fluid control valve threads

• trigger pivot pin

• fluid needle shaft

Compliant Cleaning Methods

1. Place spray gun in a gun washer that com-

pletely encloses the gun and components

during cleaning, rinsing, and draining.

2. Spray solvent through the spray gun into

a closed gun cleaning station.

CAUTION

Trigger the gun whenever you tighten or

remove the nozzle. This keeps the needle tip

away from the nozzle seating surface and

prevents the tip from being damaged.

When reassembling, make sure the

air cap matches the color etched onto

the side of the nozzle (gold, brown, grey,

blue, etc.).

This manual suits for next models

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