Graco Inc. 309295L Paint Sprayer User Manual


 
Introduction
6 309295L
Introduction
How the Electrostatic AA
Spray Gun Works
The air-assisted spray gun combines airless and air
spraying concepts. The spray tip 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 oper-
ates 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 voltage
current to the gun’s electrode.
The regulated air that is directed to the air cap can be
further controlled using the gun’s atomizing air adjust-
ment valve. This valve can be used to restrict air flow to
the air cap while maintaining sufficient air flow to the tur-
bine.The atomizing air adjustment valve does not control
pattern width. To change pattern width, a new tip size
must be used.
The high working fluid pressure of this gun provides the
power needed to atomize higher solids materials.
The gun’s internal power supply provides high voltage
current. 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.
NOTE: For airless atomization, if desired, turn the gun’s
atomizing air adjustment valve completely off. Closing
this valve does not affect turbine operation.
WARNING
Skin Injection Hazard
Remember, this is not an air spray gun.
For your safety, read and follow all Warn-
ings in this manual.