Spraying Techniques; Adjusting Pressure; Getting Started With Basic Techniques - Graco MAGNUM 309225W Operation Manual

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.
Motor only runs when gun is triggered.
Sprayer is designed to stop pumping when
gun trigger is released.
Preventing Excessive Tip
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.
• Spray at lowest pressure that atomizes
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.
If tails persist when spraying at the highest
pressure, a larger tip is needed or the
material may need to be thinned.
309225W

Adjusting Pressure

Align arrow on sprayer with function symbol on
Pressure Control knob, page 11.
• Turning knob to right (clockwise)
increases pressure at gun.
• Turning it left (counter-clockwise)
decreases pressure.
Getting Started With Basic
Techniques
Practice spraying on a piece of scrap or
cardboard before you begin spraying.
• Hold gun 12
in. (30 cm)
from surface
and aim
straight at
surface. Tilt-
ing gun to
direct spray
angle causes
an uneven
finish.
even finish
• Flex wrist to
keep gun
pointed
straight. Fan-
ning gun to
direct spray at
angle causes
uneven finish.
Spraying Techniques
even finish
thick
uneven
finish
thin
thin thick thin
15