Graco Inc. 309225W Manuale Utente

Pagina di 28
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.
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.
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
Hold gun 12 
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.
Motor only runs when gun is triggered. 
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.
GOOD
SPRAY
TAILS
PRESSURE
TOO
TIA
Practice spraying on a piece of scrap or 
cardboard before you begin spraying.
TIA
even finish
thick
thin
uneven
finish
TIA
even finish
thin
thick
thin