Spray Adjustments (Htx 680 Applicator) - Graco 262927 Instructions Manual

Spray Adjustments (HTX 680 Applicator)

Spray Adjustments Adjustments (HTX
Spray Spray Adjustments
Figure 30
Key:
Key: Key:
M Needle Valve for Air Assist Flow Control
U Air Assist Shutoff Ball Valve
DA Air Assist Air Line
DB Fluid and Air Manifold
DC Tip (Nozzle)
DD Tip Retainer
DE Air Check Valve
DF Fluid Inlet Swivel
DG Handle
The spray pattern can be adjusted by changing:
• Tip (DC) size
• Fluid flow, use air motor regulator adjustment knob
(G)
• Air flow, use needle valve (M)
The standard applicator adjustment is to fully open
the air assist valve (U), while adjusting the needle
26
(HTX 680 680 Applicator) Applicator)
(HTX 680 Applicator)
M
DA
U
DE
DF
valve (M) for the minimum air flow necessary for a
good pattern.
Air bleeds from the applicator nozzle whenever
the applicator air assist needle valve (M) is open.
Close the valve (U) to stop the majority of air flow, if
desired. Some air will still bleed through valve (U) to
help keep the air passages clean. Otherwise, the air
valve (U) can stay open during priming. Air must be
on prior to any fluid flow.
Adjusting the spray pattern requires testing to
balance the fluid flow and the air to the applicator,
and requires the correct tip size.
Always run full air volume through the applicator
when you are done spraying to remove any fluid
residue. Remove and clean the tip (DC) by hand.
Remove air check valve (DE) to be sure no fluid has
backed up to the check valve. If it has, remove and
clean air spool valve (U).
Fine Finish pattern discs and adapter kit 287227 is
included and can be added for more pattern control.
See manual 310617.
DC
332612C