Graco 333309E User Manual

Instructions - Parts

Cart Mount

Wall Mount

II 2 G

M2K Spray Packages

For two-component finishing and coating applications in hazardous and non-hazardous locations. For professional use only.

Important Safety Instructions

Read all warnings and instructions in this manual. Save these instructions.

See page 4 for Model Information. See page 53 for Maximum Working Pressure.

333309E

c IIB T3

Contents

Related Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Important Isocyanate (ISO) Information . . . . . . . . 7

Isocyanate Conditions . . . . . . . . . . . . . . . . . . . . 7

Keep Components A and B Separate . . . . . . . . . 7

Moisture Sensitivity of Isocyanates . . . . . . . . . . . 7

Changing Materials . . . . . . . . . . . . . . . . . . . . . . . 7

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Typical System Installation . . . . . . . . . . . . . . . . . 8

Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Proportioner Overview . . . . . . . . . . . . . . . . . . . 10

Model 24W609 (for Polyester applications) . . . . 12

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Prepare the Operator . . . . . . . . . . . . . . . . . . . . 14

Prepare the Site . . . . . . . . . . . . . . . . . . . . . . . . 14

Wall Mount Packages . . . . . . . . . . . . . . . . . . . . 14

Air Line Accessories . . . . . . . . . . . . . . . . . . . . . 14

Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Connect Air Lines . . . . . . . . . . . . . . . . . . . . . . . 16

Feed Systems . . . . . . . . . . . . . . . . . . . . . . . . . . 16

A and B Components . . . . . . . . . . . . . . . . . . . . 17

Checking the Mix Ratio . . . . . . . . . . . . . . . . . . . 17

Flush the Pump Before First Use . . . . . . . . . . . 18

Wet Cup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Pressure Relief Procedure . . . . . . . . . . . . . . . . 19

Prime the Pump . . . . . . . . . . . . . . . . . . . . . . . . 19

Load Mix Material to the Gun . . . . . . . . . . . . . . 20

Spray Gun Adjustment . . . . . . . . . . . . . . . . . . . 21

Mix Material Flush Procedure . . . . . . . . . . . . . . 22

Using the Proportioning Pump System . . . . . . . 26

Monitoring the Proportioner During Operation . 27

Changing ratios . . . . . . . . . . . . . . . . . . . . . . . . . 27

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Care of the Pump . . . . . . . . . . . . . . . . . . . . . . . 29

Preventive Maintenance Schedule . . . . . . . . . . 29

Tighten Threaded Connections . . . . . . . . . . . . . 29

Flush the Pump . . . . . . . . . . . . . . . . . . . . . . . . . 29

Wet Cup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Fluid Pressure Relief Valves . . . . . . . . . . . . . . . 30

Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Storage and Extended Shutdown . . . . . . . . . . . 30

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Performance Charts . . . . . . . . . . . . . . . . . . . . . . . . 33

Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Cart Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Wall Mounting Bracket . . . . . . . . . . . . . . . . . . . . 38

Air Control Assembly . . . . . . . . . . . . . . . . . . . . . 39

Motor Assembly . . . . . . . . . . . . . . . . . . . . . . . . . 42

Lower Assembly . . . . . . . . . . . . . . . . . . . . . . . . 44

Fluid Inlet Assembly . . . . . . . . . . . . . . . . . . . . . 46

Fluid Outlet Assembly

(Except Model 24W609) . . . . . . . . . . . . . . . 47

Fluid Outlet Assembly

(for Polyester Model 24W609) . . . . . . . . . . . 48

Spray Gun and Hose . . . . . . . . . . . . . . . . . . . . . 49

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Wall Bracket Mounting . . . . . . . . . . . . . . . . . . . . 51

Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Technical Data Matrix . . . . . . . . . . . . . . . . . . . . 53

Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 54

2 333309E

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Manual Description

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308652

312796

312792

Merkur

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NXT

Merkur 307273 Fluid Outlet Filter 308547 Pressure Relief Valve 306861 Ball Valves, Check Valves, and Swivels 312414

AirPro 3A0149 G15/G40 Spray Gun 312145

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333309E 3

Models

Sprayer

Type

Air Spray

Air Assisted

Air Spray

Airless

Airless - For

Split-Batch

Polyester

Applications

Pump

Ratio

1:1

2:1

3:1

4:1

5:1

6:1

1:1

2:1

3:1

4:1

5:1

6:1

1:1

2:1

3:1

4:1

5:1

6:1

1:1 Cart 24W609

Mounting

Type

Cart 24V868 1/4 ID Mix Fluid Hose x 25 ft. (7.6 m)

Wall 24V874 None

Cart 24V869 1/4 ID Mix Fluid Hose x 25 ft. (7.6 m)

Wall 24V875 None

Cart 24V870 1/4 ID Mix Fluid Hose x 25 ft. (7.6 m)

Wall 24V876 None

Cart 24V871 1/4 ID Mix Fluid Hose x 25 ft. (7.6 m)

Wall 24V877 None

Cart 24V872 1/4 ID Mix Fluid Hose x 25 ft. (7.6 m)

Wall 24V878 None

Cart 24V873 1/4 ID Mix Fluid Hose x 25 ft. (7.6 m)

Wall 24V879 None

Cart 24V880 3/16 ID Mix Fluid Hose x 25 ft. (7.6 m)

Wall 24V886 None

Cart 24V881 3/16 ID Mix Fluid Hose x 25 ft. (7.6 m)

Wall 24V887 None

Cart 24V882 3/16 ID Mix Fluid Hose x 25 ft. (7.6 m)

Wall 24V888 None

Cart 24V883 3/16 ID Mix Fluid Hose x 25 ft. (7.6 m)

Wall 24V889 None

Cart 24V884 3/16 ID Mix Fluid Hose x 25 ft. (7.6 m)

Wall 24V890 None

Cart 24V885 3/16 ID Mix Fluid Hose x 25 ft. (7.6 m)

Wall 24V891 None

Cart 24V892 3/16 ID Mix Fluid Hose x 25 ft. (7.6 m)

Wall 24V898 None

Cart 24V893 3/16 ID Mix Fluid Hose x 25 ft. (7.6 m)

Wall 24V899 None

Cart 24V894 3/16 ID Mix Fluid Hose x 25 ft. (7.6 m)

Wall 24V901 None

Cart 24V895 3/16 ID Mix Fluid Hose x 25 ft. (7.6 m)

Wall 24V902 None

Cart 24V896 3/16 ID Mix Fluid Hose x 25 ft. (7.6 m)

Wall 24V903 None

Cart 24V897 3/16 ID Mix Fluid Hose x 25 ft. (7.6 m)

Wall 24V904 None

Model Fluid/Air Hose Lower A Lower B

Remote Manifold to Airless Gun

3/16 ID Mix Fluid Hose x 25 ft. (7.6 m) +

10 ft. (3 m)

Air

Motor

50cc 50cc

100cc 50cc

75cc 25cc

2.5 in.

100cc 25cc

125cc 25cc

150cc 25cc

50cc 50cc

100cc 50cc

75cc 25cc

7.5 in.

100cc 25cc

125cc 25cc

150cc 25cc

50cc 50cc

100cc 50cc

75cc 25cc

7.5 in.

100cc 25cc

125cc 25cc

150cc 25cc

25cc 25cc 4.5 in.

4 333309E

Warnings

WARNINGWARNINGWARNING

WARNING

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. When these symbols appear in the body of this manual, refer back to these Warnings. Additional, product-specific warnings

may be found throughout the body of this manual where applicable.

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 power or light switches on or off when flammable fumes are present.

• Ground all equipment in the work area. See Grounding instructions.

• Use only grounded hoses.

• Hold gun firmly to side of grounded pail when triggering into pail.

• 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.

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 spray without tip guard and trigger guard installed.

• Engage trigger lock when not spraying.

• Do not point gun at anyone or at any part of the body.

• Do not put your hand over the spray tip.

• Do not stop or deflect leaks with your hand, body, glove, or rag.

• Follow the Pressure Relief Procedure when you stop spraying and before cleaning, checking, or ser- vicing equipment.

• Tighten all fluid connections before operating the equipment.

• Check hoses and couplings daily. Replace worn or damaged parts immediately.

333309E 5

Warnings

WARNINGWARNINGWARNING

WARNING

EQUIPMENT MISUSE HAZARD

Misuse can cause death or serious injury.

• Do not operate the unit when fatigued or under the influence of drugs or alcohol.

• Do not exceed the maximum working pressure or temperature rating of the lowest rated system com-

ponent. 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. For complete information about your material, request MSDS from distributor or retailer.

• Do not leave the work area while equipment is energized or under pressure.

• Turn off all equipment and follow the Pressure Relief Procedure when equipment is not in use.

• Check equipment daily. Repair or replace worn or damaged parts immediately with genuine manufacturer’s replacement parts only.

• Do not alter or modify equipment. Alterations or modifications may void agency approvals and create safety hazards.

• Make sure all equipment is rated and approved for the environment in which you are using it.

• Use equipment only for its intended purpose. Call your distributor for information.

• Route hoses and cables away from traffic areas, sharp edges, moving parts, and hot surfaces.

• Do not kink or over bend hoses or use hoses to pull equipment.

• Keep children and animals away from work area.

• Comply with all applicable safety regulations.

MOVING PARTS HAZARD

Moving parts can pinch or amputate fingers and other body parts.

• Keep clear of moving parts.

• Do not operate equipment with protective guards or covers removed.

• Pressurized equipment can start without warning. Before checking, moving, or servicing equipment, follow the Pressure Relief Procedure in this manual. Disconnect power or air supply.

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 MSDS’s 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.

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

6 333309E

Important Isocyanate (ISO) Information

Isocyanates (ISO) are catalysts used in two component materials.

Isocyanate Conditions

Partially cured ISO will reduce performance and the life of all wetted parts.

Spraying or dispensing materials containing isocyanates creates potentially harmful mists, vapors, and atomized particulates.

Read material manufacturer’s warnings and material MSDS to know specific hazards and precautions related to isocyanates.

Prevent inhalation of isocyanate mists, vapors, and atomized particulates by providing sufficient ventilation in the work area. If sufficient ventilation is not available, a supplied-air respirator is required for everyone in the work area.

To prevent contact with isocyanates, appropriate personal protective equipment, including chemically impermeable gloves, boots, aprons, and goggles, is also required for everyone in the work area.

Keep Components A and B

• Always use a sealed container with a desiccant

dryer in the vent, or a nitrogen atmosphere. Never store ISO in an open container.

• Keep the ISO pump wet cup or reservoir (if installed) filled with appropriate lubricant. The lubricant creates a barrier between the ISO and the atmosphere.

• Use only moisture-proof hoses compatible with ISO.

• Never use reclaimed solvents, which may contain moisture. Always keep solvent containers closed when not in use.

• Always lubricate threaded parts with an appropriate lubricant when reassembling.

NOTE: The amount of film formation and rate of crystallization varies depending on the blend of ISO, the humidity, and the temperature.

NOTICE

Separate

Cross-contamination can result in cured material in fluid lines which could cause serious injury or damage equipment. To prevent cross-contamination:

• Never interchange component A and component

B wetted parts.

• Never use solvent on one side if it has been contaminated from the other side.

Moisture Sensitivity of Isocyanates

Exposure to moisture (such as humidity) will cause ISO to partially cure; forming small, hard, abrasive crystals, which become suspended in the fluid. Eventually a film will form on the surface and the ISO will begin to gel, increasing in viscosity.

Changing Materials

NOTICE

Changing the material types used in your equipment requires special attention to avoid equipment damage and downtime.

• When changing materials, flush the equipment multiple times to ensure it is thoroughly clean.

• Always clean the fluid inlet strainers after flushing.

• Check with your material manufacturer for chemical compatibility.

• When changing between epoxies and urethanes or polyureas, disassemble and clean all fluid components and change hoses. Epoxies often have amines on the B (hardener) side. Polyureas often have amines on the B (resin) side

333309E 7

Introduction

B Supply

A Supply

Solvent

Solvent Flush Supply Hose

Air Supply

Solvent Pump

Introduction

The Graco M2K spray packages are intended for use with two-component epoxy, polyurethane, and polyester split batch (Model 24W609) materials in industrial applications. When maintained and operated properly they can produce a ±1% ratio accuracy, while simultaneously reducing material waste and cleanup solvent use, over hand mixing, and hot potting applications.

Typical System Installation

FIG. 1 is only a guide for selecting and installing system components and accessories. Contact your Graco distributor for assistance in designing a system to suit your particular needs.

Always use Genuine Graco Parts and Accessories, available from your Graco distributor. If you supply your own accessories, be sure they are adequately sized and pressure-rated for your system.

FIG. 1 Typical System Installation

8 333309E

Notes

Introduction

333309E 9

Introduction

B Supply

A Supply

Proportioner Overview

FIG. 2 Typical Installation, Non-Polyester Models

10 333309E

Introduction

A Air Shutoff Valve (optional accessory, purchase separately) - Isolates the air line accessories for servicing. B Air Filter (optional accessory, purchase separately) - Removes harmful dirt and moisture from the com-

pressed air supply.

C Gun Air Pressure Gauge - Displays atomizing air pressure to spray gun. D Gun Air Pressure Regulator - Adjusts the air pressure to the air spray or air-assisted spray gun (L). E Bleed Type Master Air Valve - Red-handled valve required to relieve air trapped between it and the air motor

and gun when the valve is closed. Do not block access to the valve.

F Mix Manifold - Combines A and B fluid flows out to mixer. G Pump Air Pressure Gauge - Displays pump air pressure. H Pump Air Pressure Regulator - Controls pump speed and outlet pressure by adjusting the air pressure to the

pump.

J Solvent Flush Inlet - On the mix manifold; provides flush point for mixed material. K Gun Swivel - Allows for easier gun movement and comes attached to the blue hose (AA packages). The airless

gun has a built-in fluid swivel.

L Spray Gun - The air spray, air-assisted, or airless spray gun (L) dispenses the fluid. The gun houses the spray

tip or nozzle (not shown), which is available in a wide range of sizes for different spray patterns and rates of

flow. Refer to gun manual for tip installation. See Related Manuals, page 3. M Gun Fluid Supply Hose - Blue hose. Provides the gun fluid supply. N Gun Air Supply Hose - Transparent hose (labeled “Air Hose Only”) provides the gun air supply. PA Fluid Pressure Gauge A Supply Side - Displays fluid pressure from pump to mix manifold PB Fluid Pressure Gauge B Supply Side - Displays fluid pressure from pump to mix manifold Q Pinch Guard - Shield covering all moving parts. R Pump Fluid Outlet - Outlet port of the pump. S Grounding Wire - Provides true earth ground for static dissipation. T Wet-Cup - Maintains consistent lubrication for packings and keeps paint from drying on displacement rod. U Pump Fluid Inlet - Inlet port of the pump. VA Suction Hose with Strainer A Supply - Allows the pump to draw fluid from a 5 gallon (19 liter) pail. A fluid hop-

per with screen also is available. VB Suction Hose with Strainer B Supply - Allows the pump to draw fluid from a 5 gallon (19 liter) pail. A fluid hop-

per with screen also is available. W Fluid Drain Valve - Relieves fluid pressure in the filter and allows for easier filter removal for cleaning. X Mixer - Static fluid mixer. Mixes combined flows of A and B from mix manifold. Y Motor - Powers pump Z Pressure Relief Valve - Prevents pumps from generating pressures higher than system rated pressure. Do not

cap or restrict the bottom threaded port. Fluid must be allowed to exit the bottom port if an over pressure

occurs. Refer to Relief Valve manual. See Related Manuals, page 3. CC Pump Outlet Hose - Provides fluid to the mix manifold from the pump. DD Solvent Flush Supply Hose -

Provides fluid to the mix manifold from solvent pump.

EE Fluid Filter - 60 mesh (250 micron) stainless steel element filters particles from fluid as it leaves the pump.

Air Relief Valve (not shown) - Opens automatically to prevent overpressurization of the air motor.

333309E 11

Introduction

B Supply

A Supply

Model 24W609 (for Polyester applications)

FIG. 3 Typical Installation, Polyester Model

12 333309E

Introduction

pressed air supply.

C Gun Air Pressure Gauge - Displays atomizing air pressure to spray gun. Used only if the application requires

an optional air spray or air-assisted spray gun (sold separately).

D Gun Air Pressure Regulator - Adjusts the air pressure to the air spray or air-assisted spray gun (L). Used only

if the application requires an optional air spray or air-assisted spray gun (sold separately).

E Bleed Type Master Air Valve - Red-handled valve required to relieve air trapped between it and the air motor

and gun when the valve is closed. Do not block access to the valve.

pump.

J Solvent Flush Inlet - On the mix manifold; provides flush point for mixed material. K Gun Swivel - Allows for easier gun movement and comes attached to the blue hose (AA packages). The airless

gun has a built-in fluid swivel.

L Spray Gun - The air spray, air-assisted, or airless spray gun (L) dispenses the fluid. The gun houses the spray

tip or nozzle (not shown), which is available in a wide range of sizes for different spray patterns and rates of

flow. Refer to gun manual for tip installation. See Related Manuals, page 3. M Gun Fluid Supply Hose - Blue hose. Provides the gun fluid supply. PA Fluid Pressure Gauge A Supply Side - Displays fluid pressure from pump to mix manifold PB Fluid Pressure Gauge B Supply Side - Displays fluid pressure from pump to mix manifold Q Pinch Guard - Shield covering all moving parts. S Grounding Wire - Provides true earth ground for static dissipation. T Wet-Cup - Maintains consistent lubrication for packings and keeps paint from drying on displacement rod. U Pump Fluid Inlet - Inlet port of the pump. VA Suction Hose with Strainer A Supply - Allows the pump to draw fluid from a 5 gallon (19 liter) pail. A fluid hop-

per with screen also is available. VB Suction Hose with Strainer B Supply - Allows the pump to draw fluid from a 5 gallon (19 liter) pail. A fluid hop-

per with screen also is available. X Mixer - Static fluid mixer. Mixes combined flows of A and B from mix manifold. Y Motor - Powers pump Z Pressure Relief Valve - Prevents pumps from generating pressures higher than system rated pressure. Do not

cap or restrict the bottom threaded port. Fluid must be allowed to exit the bottom port if an over pressure

occurs. Refer to Relief Valve manual. See Related Manuals, page 3. CC Pump Outlet Hose - Provides fluid to the mix manifold from the pump. DD Solvent Flush Supply Hose - Provides fluid to the mix manifold from solvent pump.

Air Relief Valve (not shown) - Opens automatically to prevent overpressurization of the air motor. GG Return Line Valve HH Return Line Tube/Hose Assembly

333309E 13

Installation

Prepare the Operator

All persons who operate the equipment must be trained in the operation of all system components as well as the proper handling of all fluids. All operators must thoroughly read all instruction manuals, tags, and labels before operating the equipment.

Prepare the Site

Compressed Air

• Ensure that you have an adequate compressed air supply.

• Bring a compressed air supply line from the air compressor to the pump location.

• Be sure all air hoses are properly sized and pressure-rated for your system. The air hose should have a 3/8 npt(m) thread and minimum 3/8” (9.5 mm) ID.

• Use only electrically conductive hoses. A quick disconnect coupling may be used.

Work Area

Wall Mount Packages

Before installing a wall mounted package, ensure the wall can support the weight of the pump, bracket, hoses and accessories, as well as the stress caused during operation.

1. Position the wall bracket about 1-1.5 m (3-5 ft) above the floor. For ease of operation and service, make sure the pump air inlet, fluid inlet, and fluid outlet ports are easily accessible.

2. Using the wall bracket as a template, drill 10 mm (0.4 in.) mounting holes in the wall. Wall mounting dimensions are shown on page 51.

3. Attach the bracket to the wall. Use 3/8 in. (9 mm) screws that are long enough to anchor the pump securely during operation.

NOTE: Be sure the bracket is level.

Air Line Accessories

Install the following accessories in FIG. 1, using adapters as necessary.

• Keep the site clear of any obstacles or debris that could interfere with the operator's movement.

• Have a grounded, metal pail available for use when flushing the system.

• An air filter (B) removes harmful dirt and moisture from the compressed air supply.

• A second bleed-type air shutoff valve (A) isolates the air line accessories for servicing. Locate upstream from all other air line accessories.

14 333309E

Grounding

ti12914a

Installation

3. Air compressor

Follow manufacturer's recommendations.

The equipment must be grounded to reduce the risk of static sparking. Static sparking can cause fumes to ignite or explode. Grounding wire provides an escape path for static electric current.

The following components must be grounded.

1. Pump

See F

IG. 4. Verify that the ground screw (GS) is

attached and tightened securely to the air motor. Connect the other end of the ground wire (S) to a true earth ground.

IG. 4. Ground screw and wire

2. Pump fluid hoses

Use only electrically conductive fluid hoses. Check electrical resistance of hoses. If total resistance to ground exceeds 25 megohms, replace hose immediately.

4. Spray gun

Ground through connection to a properly grounded fluid hose and pump.

5. Fluid supply container

Follow your local code.

6. Object being sprayed

Follow your local code.

7. Solvent pails used when flushing

Use only metal pails, which are conductive, placed on a grounded surface. Do not place the pail on a non-conductive surface, such as paper or cardboard, which interrupts the grounding continuity. All solvent pails used when flushing must be grounded according to local code.

NOTE: To maintain grounding continuity when flushing or relieving pressure, hold a metal part of the spray gun firmly to the side of a grounded metal pail, then trigger the gun.

333309E 15

Setup

See FIG. 2.

1. Install suction hoses (VA, VB) to the pump fluid inlets (U). See page 46.

2. Connect solvent supply (DD) to solvent flush inlet (J).

3. Attach one end of the gun fluid supply hose (M) to the mixer (X) outlet.

4. Attach one end of the gun air supply hose (N) to gun air pressure regulator (D) atomizing air port.

5. Attach remaining end of the gun air supply hose (N) to air inlet at base of gun (L).

6. Connect gun fluid supply hose (M) to the base of the gun (L) at swivel (K).

7. Clip gun fluid supply hose (M) and gun air supply hose (N) together with the supplied hose clips (qty. of 7). Space clips as needed.

8. Apply lens cover to both regulator gauge lenses.

Feed Systems

Ensure your feed systems are designed to supply twice the volume used by each component. This supply pump pressure should never exceed 25% of the proportioner output pressure or 250 psi (16 bar) maximum supply pressure.

Example: 4:1 proportioner. 2.0 lpm output, 100 bar.

4:1 ratio at 2.0 lpm = 1.6 lpm of “A” component and.4 lpm of component “B”.

• “A” feed pump needs to have a 3.2 lpm capacity at a max of 250psi (16 bar).

• “B” feed pump needs to be at least.8 lpm at 250 psi max.

Material supply is critical to proper proportioner operation. Material must fill the proportioner cylinders on their upstroke totally to eliminate a “diving” of the cylinders on the top change–over. This “diving” will also be seen as a pressure drop at the change over. This will cause an off ratio condition.

9. Verify that suction hose (VA, VB) fittings are tight.

NOTE: Loose suction hose fittings allow air to enter into the proportioning pump resulting in the fluid ratio to be altered.

Connect Air Lines

See FIG. 1.

1. Attach fittings to the air control module.

2. Attach the air hose to the fitting on the air control module.

NOTE: The air supply line to proportioner module has to be a minimum of 3/8 in. (9.5 mm) ID.

3. Attach air line to solvent pump.

NOTICE

Using more supply pressure than necessary to fully supply the proportioning cylinder can cause varying atomization, inconsistent spray pressure, and incorrect fluid ratios.

If materials require heating they can be heated in the supply feed as well as the outbound side of the pumps. The maximum fluid temperature of 160°F should not be exceeded.

Review your feed systems with your Graco Distributor.

16 333309E

Setup

A and B Components

Cross-contamination can result in cured material in fluid lines which could cause serious injury or damage equipment. To prevent cross-contamination:

• Never interchange component A and component

B wetted parts.

• Never use solvent on one side if it has been contaminated from the other side.

NOTE: Material suppliers can vary in how they refer to plural component materials.

Be aware that when facing the manifold on the proportioner:

• Component A is on the left side.

• Component B is on the right side. For all machines:

• The A side is intended for polyols, resins, and bases.

• If one of the materials being used is moisturesensitive, that material should always be in the B side.

• The B side is intended for ISO, hardeners, and catalysts.

NOTE: For machines with material volume ratios other than 1:1, the higher volume side is typically at the A side.

Polyester Model 24W609: This model is intended for use with split-batch polyester applications. The A side will contain polyester, resin, and the promoter. The B side will contain polyester, resin, and the activator.

Checking the Mix Ratio

The pump must be operating in order to accurately check the proportioning ratio of the pumps. The outlet pressures at the pumps must be maintained at a minimum level of 4 times that of the inlet pressures.

When the mix manifold is removed to check the mix ratio, a flow restrictor will be needed to simulate the pressure conditions during normal operation. The preferred flow restrictor is a small diameter, 1/16 in. ID, 1/2 in. (13 mm) long steel tube, coupled to the fluid supply hoses. A needle-type flow control valve could also be used. Contact your Graco distributor for assistance in selecting the proper type of flow restrictor for your application.

If the mixed fluid does not cure or harden properly, check the ratio of part A to part B. To check the ratio:

1. Relieve the pressure, see page 19.

2. Flush the mixed fluid out of the mix manifold, dispensing lines, and equipment.

3. Disconnect the fluid hoses from the mix manifold inlet, taking note of which hose was connected to which valve.

4. Place the hose ends into a waste container. Set two graduated cylinders of the same size next to the waste container. See F

5. Set the air pressure to the proportioning pumps at zero pressure. Open the air shut off valves to the feed pumps and proportioning pump.

IG. 5.

6. Turn up air pressure until fluids are flowing freely, at exactly the same time, move the hoses over the cylinders – part A hose over one cylinder and part B hose over the other.

333309E 17

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