Graco 3A2495C Paint Sprayer User Manual


 
Gun Overview
Gun Overview
How the Electr
ostatic AA Spray Gun
Works
This is not an air spray gun. To help prevent
serious injury from pressurized fluid, such as skin
injection, and splashing fluid, read and follow the
Skin Injection Hazard Warnings on page 5.
The air-assisted spray gun combines airless and
air spraying concepts. The spray tip atomizes
and shapes the fluid into a fan pattern, as does
a conventional airless spray tip. Air from the air
cap further atomizes the fluid and completes the
atomization of the fluid tails to produce a uniform
pattern.
As the gun is triggered, part of the regulated air
operates the alternator turbine and the rest of the
air helps atomize the fluid being sprayed. The
alternator ge
nerates power, which is converted by
the power car
tridge to supply high voltage to the
gun’s electr
ode.
The fluid is electrostatically charged as it passes
the electrode. The charged fluid is attracted to the
grounded workpiece, wrapping around and evenly
coating all surfaces.
The regulated air that is directed to the air cap can
be further controlled using the gun’s atomizing air
adjustment valve. This valve can be used to restrict
air flow to the air cap while maintaining sufficient air
flow to the alternator. The atomizing air adjustment
valve does not control pattern width. To change
patternwidth,useanewtipsize,orusethefan
adjustment to narrow the pattern width.
Thehighw
orking fluid pressure of this gun provides
the power
needed to atomize higher solids materials.
NOTE: For airless atomization, if desired, turn the
gun’s atomizing air adjustment valve completely off.
Closing this valve does not affect alternator operation.
3A2495C
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