Graco Optimiser 2K 02748 Instructions Manual page 11

6. Adjust the spray pattern. (continued)
C. Hold the gun parallel to the floor and adjust the
adhesive fluid pressure until you have a 1 to 6
inch (25.4 to 152.4 mm) straight fluid stream
before the stream falls off. See Fig. 14.
straight fluid stream
Fig. 14
NOTE: A larger fluid nozzle at a reduced adhesive
pressure will maintain the same flow rate, but slow
down the fluid stream. See Fig. 15. This allows the
atomizing air to act on the fluid longer and improve
the atomization.
Fluid Stream of Fluid Nozzles
at the Same Flow Rate
0.042 0.055 0.070
(1.067) (1.397) (1.778)
Nozzle Orifice Size in inches (mm)
Fig. 15
Setup and Shutdown
1–6 in.
(25.4–152.4 mm)
0.086 0.110
(2.184) (2.794)
D. To further reduce the volume of adhesive out-
put at the gun, turn the fluid adjustment knob
(8) clockwise as needed. See Fig. 16. How-
ever, for the best results, adjust the adhesive
pressure or use a different size needle/nozzle/
air cap combination to change the fluid flow.
Refer to page 4.
Continuously spraying with the fluid adjustment knob
closed , will cause accelerated wear on the fluid
needle and trigger/air valve shaft interface.
If the fluid adjustment knob is fully closed, the gun
will emit only air and activator.
02754
Fig. 16
E. Open the pattern adjusting valve by turning the
knob (13a) fully counterclockwise. See Fig. 17.
02755
Fig. 17
CAUTION
8
Close
13a
Open
(wider
pattern)
02784
Close
(narrower
pattern)
02784