Spray Finishing Application - Graco PerformAA 26B570 Instructions Manual

Too little
pressure
No Pressure
TI0792
F . 13: Correct Spray Pattern
IG
4. Turn on the atomizing air and set the air pressure at
about 10 psi (70 kPa, 0.7 bar). Check the spray
pattern, and then adjust the air pressure until the
tails are completely atomized and pulled into the
spray pattern. See F
(0.7 MPa, 7 bar) air pressure to the gun.
NOTE: For HVLP operation do not exceed 10 psi at the
air cap. Use HVLP verification kit 249140 to measure
the atomization pressure at the air cap.
5. Adjust the pattern width if desired.
Wide pattern
(Standard)
F . 14: Spray pattern widths
IG
For a narrower pattern, supply air to the gun fan air inlet
(or open the fan adjustment valve on adjustable
manifolds). The tip size is the primary controller of the
pattern size. Use the fan air only as needed to slightly
adjust the pattern size.

Spray Finishing Application

3A8553A
Correct
amount of
pressure
. 13. Do not exceed 100 psi
IG
Narrow Pattern
The spray gun has a built-in lead and lag operation.
When triggered, the gun begins emitting air before the
fluid is discharged. When the trigger actuation air is
stopped, the fluid stops before the air flow stops. This
helps assure the spray is atomized and prevents fluid
buildup on the air cap and tip.
Adjust the system control device, if it is automatic, so
the gun starts spraying just before meeting the work
piece and stops as soon as the work piece has passed.
Keep the gun a consistent distance, 8 to 10 inches (200
to 250 mm), from the surface of the object being
sprayed.
To achieve best results when applying fluid:
• Keep gun perpendicular and 8 to 10 inches (200 to
250mm) from object being sprayed.
• Use smooth, parallel strokes across surface to be
sprayed with 50% overlap. See F
Incorrect
Correct
F . 15: Correct Spray Method
IG
Operation
. 15.
IG
TI8098a
15