Graco 980 Instructions Manual page 9

Establish the Correct Air Flow
4. Test spray pattern and atomization while holding
gun about 6 to 8 inches (150 to 200 mm) from test
piece.
5. Air Control Valve (M) on end of turbine hose
controls both atomizing air and pressure in spray
gun cup. See Fig. 9. Adjust air control valve as
needed.
Fig. 9
NOTES:
D Control over-spray mist by using only as much air
as necessary to spray fluid. Lighter fluids require
less air.
D If atomization is still unacceptable, fluids may be
thinned further or a different fluid set may be
required. Refer to page 10 to determine fluid set or
page 5 to prepare fluid.
Setup
M
02850
Adjust the Pattern Size
Change pattern size by turning air cap retaining ring in
for a wide pattern or out for a narrow pattern.
See Fig. 10.
normal
spray
pattern
wider
spray
pattern
narrower
spray
pattern
1
Turning air cap in too far will retard atomization.
Turning air cap out too far stops fluid or causes flutter.
2
Fig. 10
air cap flush
with fluid nozzle
turn air cap
retaining ring in
1
turn air cap
retaining ring out
2
02851
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