Graco Inc 308741N dimensions Operation, Pressure Relief Procedure, Applying the Fluid

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Operation

Pressure Relief Procedure

WARNING

PRESSURIZED EQUIPMENT HAZARD

The system pressure must be manually relieved to prevent the system from starting or spraying acci- dentally. To reduce the risk of an injury from acci- dental spray from the gun, splashing fluid, or moving parts, follow the Pressure Relief Proce- dure whenever you:

Dare instructed to relieve the pressure,

Dstop spraying,

Dcheck or service any of the system equipment,

Dor install or clean the spray nozzle.

1.Turn off the air and fluid supply to the gun.

2.Trigger the gun into a grounded metal waste container to relieve air and fluid pressure.

Applying the Fluid

When using the HVLP spray gun, instead of a conven- tional air spray 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 produced by lower HVLP air pressures, along with a larger fluid particle size because there is less air to blow off solvents than what is produced by conven- tional air spray. Take care to avoid runs or sags as you spray.

1.To achieve the best results when applying fluid, keep the gun perpendicular to the surface and maintain a consistent distance of approximately 6 to 8 inches (150 to 200 mm) from the object being sprayed. See Fig. 14.

2.To obtain an even finish, use smooth, even strokes across the object being sprayed with 50% overlap.

3.Paint using parallel strokes. This spray gun applies all coatings evenly without cross coating.

 

WRONG

RIGHT

Fig. 14

 

07930

 

12 308741

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Contents Instructions Parts List Table of ContentsSymbols 308741Pressurized Equipment Hazard Selection Charts Hvlp Spray Gun AssembliesHvlp Spray Gun and Pressure Cup Assemblies Hvlp Spray Gun and Gravity CupAssemblies Optional Hvlp Air CapsAir Flow and Atomizing Pressure Air FlowAtomizing Air Pressure Typical Installation Ventilate the Spray BoothSetup Connect the Air LineConnect the Fluid Hose Adjust the Spray Pattern Flush the Spray GunRelieve the Pressure Position the Air Cap Fluid Velocity of Fluid Nozzles At the Same Flow Rate Pressure Drop Chart Air Regulator Pressure Gun Inlet Pressure SettingInch 7.9 mm I.D. hose Pressure Relief Procedure OperationApplying the Fluid Daily Gun Care, Flushing, and Cleaning General System MaintenanceDo not immerse the gun in solvent 7035A 7044A 7045A Lubricate Troubleshooting Problem Cause SolutionService Items Needed for ServiceFluid Packings Replacement 2b 2a Complete Gun Packing Replacement 20 or 25b 19 or 25a Service 308741 Parts Item 2 includes 2a-2bItem 13 includes item 13a Item 25 includes 25a-25d Part No to Pressure Feed Hvlp Spray Gun Assembly Description QtyGun Needle Nozzle Kit Item 12 Nozzle Needle Assy7585A Gravity Feed Hvlp Spray Gun Assembly Accessories Gravity Cup Gravity Cup Holder BracketSST Pressure Cup Kit 239802 with single air regulator Quart Remote SST Pressure CupDimensions Technical DataCategory Data 308741 Graco Standard Warranty Graco InformationToll Free