Graco 24G979 User Manual

Operation

Single Acting and Double Acting Bead Spray Guns for RoadLazer

Model: 238338 - Single Acting Bead Spray Gun Model: 24G979 - Double Acting Bead Spray Gun

200 psi (1.38 MPa, 13.8 bar) Maximum Working Pressure

Important Safety Instructions

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

™

RoadPak™ Line Striping System

- For the application of road marking reflective materials -

- For professional use only -

Single Acting Bead Spray Gun

Double Acting Bead Spray Gun

308612J

5949b

ti16176b

II 2 G

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. Product-specific hazard symbols and warnings not covered in this section may appear throughout the body of this manual where applicable.

WARNING

WARNINGWARNINGWARNING

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

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. 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.

• 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.

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, hearing loss, inhalation of toxic fumes, and burns. This equipment includes but is not limited to:

• Protective eyewear, and hearing protection.

• Respirators, protective clothing, and gloves as recommended by the fluid and solvent manufacturer.

CALIFORNIA PROPOSITION 65

The engine exhaust from this product contains a chemical known to the State of California to cause cancer, birth defects or other reproductive harm.

2 308612J

Installation

Accessories are available from Graco. Be sure all accessories are properly sized to withstand the pressures in the system.

Mount Valve

Mount the valve on a 0.50 in. (12.7 mm) diameter rod on a mounting fixture or a dispensing machine. The bead gun has a clamping set screw for mounting.

ti16199b

Connect the Air Lines

Connect Material Line

ti16200b

Grounding

Proper grounding is essential to maintaining a safe system.

To reduce the risk of static sparking, ground the pump, bead spray gun, paint spray gun and all other system equipment.

ti16177b

Single-Acting Gun

Clean all lines and connections of dirt, burrs, etc. and blow them out with clean air before connecting them to the system. Install an air filter in the air supply line to remove harmful dirt and moisture from the compressed air.

Double-Acting Gun

ti16198b

1. Pump: Use a ground wire and clamp.

2. Air compressors and hydraulic power supplies:

Follow manufacturer’s recommendations.

3. Air and fluid hoses connected to the pump: Use

only grounded hoses with a maximum of 500 feet (150 m) combined hose length to ensure grounding continuity.

4. Dispensing valve: Obtain grounding through con-

nection to a properly grounded fluid hose, frame, and pump.

5. Fluid supply container: According to local code.

6. All solvent pails used when flushing: Ground

according to local code. Use only metal pails, which are conductive. Do not place the pail on a non conductive surface, such as paper or cardboard, which interrupts the grounding continuity.

308612J 3

Operation

Pressure Relief Procedure

1. Shut off air supply to the bead tank. Relieve pressure from bead tank.

2. Close the master air valve (required with air-powered pumps).

3. Actuate the dispensing valve to relieve pressure.

4. Leave the drain valve(s) open until you are ready to dispense again.

If you suspect that the dispensing valve or hose is completely clogged, or that pressure has not been fully relieved after following the steps above, very slowly loosen the hose end coupling and relieve pressure gradually, then loosen completely. Then clear the valve or hose.

Adjustments

Set the actuating air to at least 50 psi (3.5 bar) for single acting gun and 80 psi (5.5 bar) for double acting gun, then start the pump. Set the glass bead supply tank pressure between 30 psi (2.1 bar) and 75 psi (5.2 bar) for desired flow rate.

Application Data

See RoadLazer System manual 3A1214.

Nozzle Size Selection

Use the Nozzle Size Selection and Bead Delivery Tables to select the size of nozzle for the travel speed and bead coverage to be used. These tables are based on a 15 mil paint application.

1. Go to Bead Delivery (Lb/Min) Table and select:

a. Speed in MPH or KPH row.

b. Bead coverage in Pounds Per Gallon (kg/l)

column.

c. Value at intersection of MPH (KPH) row and

Pounds Per column is bead delivery in lb/min (kg/min).

2. Go to Nozzle Size Selection Table and select:

a. Bead Delivery lb/min (kg/min) column deter-

mined by Bead delivery lb/min (kg/min) value.

b. Psi value Glass Bead Tank psi (bar) row.

c. Curve (1, 2, 3 or 4) at intersection of Glass

Bead Tank psi row and Bead Delivery lb/min (kg/min) column is nozzle size value.

NOTE: Bead delivery will very with each application. Always test the system for actual delivery and adjust air pressure or nozzle size as needed.

4 308612J

d. Select nozzle size that allows range of adjust-

ment for more or less flow.

NOTE: If dispensing reflective elements for double drop application, the minimum nozzle size is .280 in. If a smaller size is used, clogging of the nozzle orifice may occur.

+ 8 hidden pages