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

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Graco Inc 312900C Overview, How the Electrostatic Air Spray Gun Works, Smart Model 247937, Standard Model 247936