Graco Inc 308584 Atomizing Air Valve Adjustment, Fine Adjustments of the Spray Gun, Operation

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Atomizing Air Valve Adjustment

Operation

7.Set the atomizing air valve (R) about 1.5 turns out for most applications. The Atomizing Air Valve Adjustment chart shows the effect of the atomiz- ing air valve adjustment on the air cap air flow.

8.Adjust the pattern width with the fan air valve (P).

Atomizing Air Valve Adjustment

	100
	90
(%)	80
(%)	70
Flow	70
	60
	50
Air	50
Air	40
Cap	40
	30
	20
Air	20
Air	10
	10
	0
	0.00	0.50	1.00	1.50	2.00	2.50	3.00

Fully Open	Valve Turns	Fully Closed
	Valve Turns

Fine Adjustments of the Spray Gun

DTo improve the atomization, open the atomizing air valve further (R). If more atomizing air is needed beyond the fully open position of the valve, increase the air hose inlet pressure.

Use the lowest air flow settings needed for accept- able atomization. The slower particle velocity will improve the electrostatic effect.

DTo reduce the atomization air and minimize any overspray, turn the atomizing air valve in.

9.Turn the ES ON-OFF lever (N) to ON to begin spraying with the electrostatics. When spraying, the ES indicator light (M) should glow, indicating the electrostatic charge.

NOTE: See Spray Pattern Troubleshooting on page 25 to correct spray pattern problems. See Voltage Loss Troubleshooting on page 22 to correct voltage problems.

10.Operate the voltage isolation system as instructed in the system manual. Normal spraying voltage for the system will be 45 to 55 kV.

11.Use the same spraying technique you would use with a conventional air spray system to coat the workpiece.

12.Relieve the pressure and discharge the voltage when you stop spraying.

CAUTION

Hang the gun with its nozzle pointing down when it is not being used to avoid having fluid run into the gun air passages. See Fig. 11. Fluid in the gun air pas- sages can cause poor atomization and excessive current demands and damage the gun.

KEY-Fig. 10

M

JFluid Adjustment Knob M ES Indicator Light

N ES ON-OFF Lever

P Fan Air Adjustment Valve R Atomizing Air Valve

*N J P R

05151A

Fig. 10

Fig. 11	05424

308584 19

Image 19

Contents Part No. 222700, Series C INSTRUCTIONS-PARTS LIST308584 100 psi 0.7 MPa, 7 bar Maximum Working PressureCaution Symbol Table of ContentsSymbols Warning SymbolELECTRIC SHOCK HAZARD PRESSURIZED EQUIPMENT HAZARD FIRE AND EXPLOSION HAZARDWarnings are continued on the next page TOXIC FLUID HAZARD EQUIPMENT MISUSE HAZARDRefer to Fig. 1, page IntroductionSpraying Waterborne Fluids Electrostatically Operating the ElectrostaticsB A C H2O PRO Voltage Block connection shown Graco Waterborne Fluid Hose purchased separatelyD Inner Hose Layer EE is a PTFE tube D Conductive Hose Layer DD covers the PTFE tubeWarning Signs InstallationInstalling the System Ventilate the Spray BoothM G F NH R B A E D P C Consult your isolation system manual for other configurationsPRO 3500wb Gun shown with the Graco H2O PRO Batch System T S N K LConnect the Exhaust Tube Install the Air Line AccessoriesInstall the Fluid LIne Accessories Connect the Air LineConnect the Fluid Hose Filter the FluidContinued on the next page H2O PRO Voltage Block Connect the Fluid Hose continuedconnection shown FIRE, EXPLOSION, AND ELECTRIC SHOCK HAZARD Ground the SystemCheck the Electrical Grounding Pressure Relief Procedure Fluid Voltage Discharge and Grounding ProcedureOperation Selecting a Fluid Nozzle and Air Cap Operating ChecklistFIRE AND EXPLOSION HAZARD Operating the Spray GunCOMPONENT RUPTURE HAZARD Fine Adjustments of the Spray Gun Atomizing Air Valve AdjustmentDaily Care and Cleaning MaintenanceShutdown Equipment needed Clean the Air Cap and Fluid NozzleProcedure Flush the Spray GunWaterborne Fluid Hose TroubleshootingVoltage Loss Troubleshooting Spray GunTests Voltage Loss Troubleshooting continuedCause Electrical TroubleshootingProblem SolutionSpray Pattern Troubleshooting Gun Operation Troubleshooting Poor Electrostatic Wrap TroubleshootingGun Operation Troubleshooting continued Test Gun Resistance Electrical TestsTest Resistor Stud Resistance Test Power Supply ResistanceTools Included with the Gun ServicePrepare the Gun for Service Air Cap/Nozzle/Resistor Stud ReplacementInstallation Air Cap/Nozzle/Resistor Stud Replacement continuedElectrode Needle Replacement Where Preventative MaintenanceIf installing the complete fluid rod assembly, go to step 11, page Fluid Packing Rod Removal and RepairFluid Packing Rod Removal and Repair continued DETAIL Fan Air Adjustment Valve RepairFluid Adjustment Assembly Repair If installing the complete valve, go to stepAir Trigger Valve Repair Fluid Adjustment Assembly Repair continued Apply a very light coat of lubricant to the o-rings 41 Atomizing Air Valve Repair MOVING PARTS HAZARD ES ON-OFF Valve Repair05363B Barrel Removal Apply a very light coat of lubricant to the o-rings 37a Power Supply Replacement Do not expose the gasket 18a to solvents Barrel Installation Turbine Alternator Replacement05158B Measurements, inches mm Graco Waterborne Fluid Hose RepairNOTE Keep all the following parts for reassembly PRO 3500SC Gun DisassemblyPRO 3500sc Gun Conversion Installing the Fluid Needle Assembly 10. Tighten the nut 78* onto the ferrule housing See Detail A Spray Gun PartsDescription EQUIPMENT MISUSE HAZARDPart No. 222700, Series C Model PRO 3500wb Spray Gun Y Replacement Warning signs are available at no cost100 psi 0.7 MPa, 7 bar Maximum Working Pressure AccessoriesUse Only Genuine Graco Parts and Accessories Waterborne Fluid Hose AssemblyGun High Voltage Probe & Meter For use in the Fluid Voltage Discharge and Ground- ing ProcedureManual Change Summary Snap Ring PliersPage Category Technical DataData EQUIPMENT NOT COVERED BY GRACO WARRANTY The Graco Warranty and DisclaimersGraco Phone Number WARRANTY