Graco Inc 247936 Overview, How the Electrostatic Air Spray Gun Works, Smart Model 247937

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Overview

Overview

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 external charging probe.

The pump supplies fluid to the hose and gun, where the fluid is atomized by the air cap and the atomized parti- cles are electrostatically charged as they pass the external charging probe. The charged fluid is attracted to the grounded workpiece, wrapping around and evenly coating all surfaces. The external charging allows the fluid supply to remain grounded at all times and therefore eliminate the need for an isolation sys- tem.

KEY

A

Air swivel inlet page 6

B

Fluid inlet page 6

C

Turbine air exhaust page 6

D

Air cap and nozzle page 6

E

Fluid needle page 6

F

Fluid adjustment page 7

G

Fan air adjustment valve page 7

H

Atomizing air restrictor valve page 7

I

ES ON/OFF switch page 7

J

ES indicator (247936 only) page 8

K

Voltage/current display (247937 only) page 8

L

ES HI/LO switch (247937 only) page 8

J

 

MAX FLUID WPR:

 

100 PSI (7bar, 0.7 Mpa)

I

MAX AIR WPR:

100 PSI (7bar, 0.7 Mpa)

 

To avoid shock or explosion •Use properly grounded air hose •Read instruction manual

I ES O

M

LO voltage adjustment (247937 only) page 8

N

External charging probe

N

E

D

Smart Model

247937

B C

H

A

ti12658

F

Standard Model

247936

L

0 KV 100%

Μa

MAX FLUID

HI WPR: 100 PSI (7bar, 0.7 Mpa)

I

LO

ES

MAX AIR

 

 

WPR:

100 PSI

 

 

 

(7bar,

0.7 Mpa)

I ES O

F

Smart Model

247937

G

ti12581

K

M

G

ti12582

312900C

5

Image 5
Contents II 2 G EEx 0.24 mJ PRO Xs Waterborne Air Spray GunTable of Contents FIRE, EXPLOSION, and Electric Shock Hazard Equipment Misuse Hazard How the Electrostatic Air Spray Gun Works OverviewSmart Model 247937 Standard Model 247936Air swivel inlet. Left-hand thread Fan air adjustment valve. Adjusts fan size ES indicator 247936 only. Green when ES is on Ventilate the Spray Booth InstallationInstall the System Typical Installation Key Grounded Air Supply Hose Connect the Air LineConnect the Charging Probe Filter the Fluid Connect the Exhaust TubeConnect the Fluid Line Orifice Size Select a Fluid Nozzle and Air CapFire, Explosion, and Electric Shock Hazard GroundingCheck Fluid Resistivity Check Electrical GroundingPrepare to Paint Check Fluid ViscosityTurn ES ON/OFF switch on Flush Pressurized Equipment Hazard Pressure ReliefShutdown Clean Gun Daily MaintenanceDaily System Care Electric Shock Hazard Electrical TroubleshootingSee Test Total Gun Resistance on See Check Electrical Grounding onTest Gun Resistance Electrical TestsTest Total Gun Resistance Test Charging Probe ResistanceTest Barrel Resistance Test Power Supply ResistanceSpray Pattern Troubleshooting Gun Operation Troubleshooting Prepare the Gun for Repair Gun RepairReplace Fluid Needle Replace Air Cap/NozzleRemove Fluid Packing Remove Fluid PackingPacking Rod Repair Packing RodRemove Barrel Install BarrelPower Supply Remove and Replace Power SupplyRemove and Replace Turbine Alternator Repair Fan Air Adjustment ValveRepair Air Valve Repair Fluid Adjustment ValveRepair ES ON/OFF Valve Remove and Replace Atomizing Air Restrictor ValveRef. No Multi-tool PartsPart No 60 kV Electrostatic Gun, Series a Standard model Part No 60 kV Electrostatic Gun, Series a Smart model Ref. No Packing Rod Ref. No Alternator Ref. No Fan Adjustment ValveRef. No ES ON/OFF Valve Smart Model controlsDescription Qty Description Qty Fluid Line Accessories AccessoriesAir Line Accessories Miscellaneous Accessories Gun AccessoriesCategory Data Technical DataGraco Information Graco Warranty