Graco Inc. 309225W Manual De Usuario
Spraying Techniques
309225W
15
Spraying Techniques
This sprayer is set up for most airless spraying
applications. Details on tip selection, tip wear,
coat thickness, etc. are provided on page 13.
applications. Details on tip selection, tip wear,
coat thickness, etc. are provided on page 13.
Preventing Excessive Tip
Wear
Wear
•
Spray should be atomized (evenly distrib-
uted, no gaps at edges). Start at low pres-
sure setting, increase pressure a little at a
time until you see a good spray pattern,
without tails.
uted, no gaps at edges). Start at low pres-
sure setting, increase pressure a little at a
time until you see a good spray pattern,
without tails.
•
Spray at lowest pressure that atomizes
paint.
paint.
•
If maximum sprayer pressure is not enough
for a good spray pattern, tip is too worn.
See Reversible Spray Tip Selection Chart,
page 14.
for a good spray pattern, tip is too worn.
See Reversible Spray Tip Selection Chart,
page 14.
Adjusting Pressure
Align arrow on sprayer with function symbol on
Pressure Control knob, page 11.
Pressure Control knob, page 11.
•
Turning knob to right (clockwise)
increases pressure at gun.
increases pressure at gun.
•
Turning it left (counter-clockwise)
decreases pressure.
decreases pressure.
Getting Started With Basic
Techniques
Techniques
•
Hold gun 12
in. (30 cm)
from surface
and aim
straight at
surface. Tilt-
ing gun to
direct spray
angle causes
an uneven
finish.
in. (30 cm)
from surface
and aim
straight at
surface. Tilt-
ing gun to
direct spray
angle causes
an uneven
finish.
•
Flex wrist to
keep gun
pointed
straight. Fan-
ning gun to
direct spray at
angle causes
uneven finish.
keep gun
pointed
straight. Fan-
ning gun to
direct spray at
angle causes
uneven finish.
Motor only runs when gun is triggered.
Sprayer is designed to stop pumping when
gun trigger is released.
Sprayer is designed to stop pumping when
gun trigger is released.
If tails persist when spraying at the highest
pressure, a larger tip is needed or the
material may need to be thinned.
pressure, a larger tip is needed or the
material may need to be thinned.
GOOD
SPRAY
SPRAY
TAILS
PRESSURE
TOO
TOO
TIA
Practice spraying on a piece of scrap or
cardboard before you begin spraying.
cardboard before you begin spraying.
TIA
even finish
thick
thin
uneven
finish
TIA
even finish
thin
thick
thin