Graco Inc 309292S, ti1600a Introduction, How the Electrostatic Air Spray Gun Works, Gun Overview

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Introduction

Introduction

How the Electrostatic Air Spray Gun Works

The air hose supplies air to the spray gun. Part of the air operates the turbine and the rest of the air atomizes the fluid being sprayed. The turbine generates power, which is converted by the power cartridge to supply high volt- age current to the gun’s electrode.

The pump supplies fluid to the hose and gun, where the fluid is electrostatically charged as it passes the elec- trode. The charged fluid is attracted to the grounded workpiece, wrapping around and evenly coating all sur- faces.

•Fan AIR adjustment valve. Adjusts fan size and shape.

•Atomizing air RESTRICTOR valve. Restricts atomizing air flow. Replace with plug (included) if desired.

•ES ON/OFF valve. Turns electrostatics ON (I) or OFF (0).

•ES INDICATOR (standard gun only). Green when ES is ON (I).

•Voltage/current DISPLAY (smart models only). Shows voltage (V) and current (A). Green=spray, yellow/red=see Troubleshooting, page 23.

Gun Overview

The electrostatic gun includes the following controls (see FIG. 1.).

•FLUID adjustment valve. Adjusts fluid rod travel. Use only in low flow conditions, to reduce wear.

ES INDICATOR

ES ON/OFF

•ES HI/LO switch (smart models only). Sets volt- age to HI or LO (factory settings).

•LO VOLTAGE adjustment (smart models only). Remove plug to adjust to four settings.

DISPLAY

LO VOLTAGE

ES HI/LO

0 KV 100%

 

μα

 

HI

LO

ES

I ES O

RESTRICTOR

ti1266a

ES ON/OFF

AIR

RESTRICTOR

FLUID

I ES O

AIR

FLUID

ti1253a

Standard Model

Smart Model

Fig. 1. Gun Overview

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309292S

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Contents
II 2 G EEx 0.24 mJ List of ModelsTable of Contents List of Models Fire, Explosion, and Electric Shock Hazard Toxic Fluid HazardEquipment Misuse Hazard Pressurized Equipment HazardIntroduction How the Electrostatic Air Spray Gun WorksGun Overview Ventilate the Spray Booth InstallationInstall the System Flammable or Toxic Vapor HazardTypical Installation Key Connect the Fluid Line Connect the Air LineConnect the Exhaust Tube Filter the FluidSelect a Fluid Nozzle and Air Cap HC Conversion KitOrifice Size 244919 Conversion Kit Grounding Check Electrical Grounding Check Gun GroundingCheck Fluid Resistivity Check Fluid ViscosityLow Voltage Adjustment Smart Guns Only OperationKV Guns Maintenance Flush the Spray GunHang the gun from its hook, with the nozzle pointing down Electrical Tests Test Gun ResistanceTest Power Supply Resistance Test Power Supply ResistanceTest Electrode Resistance Test Electrode ResistanceTroubleshooting Spray Pattern TroubleshootingGun Operation Troubleshooting Electrical Troubleshooting See Test Gun Resistance onSee Check Fluid Resistivity on Pressure Relief Procedure RepairPrepare the Gun for Service Air Cap/Nozzle Replacement Electrode Replacement Electrode ReplacementFluid Packing Removal Fluid Packing RemovalPacking Rod Repair Packing RodBarrel Removal Barrel Installation Barrel RemovalPower Supply Removal and Replacement Power SupplyTurbine Alternator Removal and Replacement Fluid Tube Removal Replacement PRO Xs4 Guns OnlyFan Air Adjustment Valve Repair Fan Air Adjustment ValveFluid Adjustment Valve Repair Air Valve RepairAtomizing Air Restrictor Valve Removal and Replacement ES ON/OFF Valve RepairParts Ref. No Alternator Ref. No Fan Adjustment Valve Ref. No Packing Rod Ref. No ES ON/OFF ValveFluid Tube Model Part No. Description Qty Part No. Description Qty 51 Ref Ref. No ES ON/OFF Valve Ref. No Packing Rod 26c 178409 SPREADER, packing Uhmwpe SWITCH, ES HI/LO Accessories Air Line AccessoriesFluid Line Accessories Gun Accessories Miscellaneous AccessoriesTechnical Data Category DataTechnical Data 309292S Graco Standard Warranty Graco InformationToll Free