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AIRLESS TIP SELECTION
Tips are ·selected
by
the orifice size and fan width. The proper selection is determined by the fan width required for a
specific job and
by
the orifice size that will supply the desired amount of fluid and accomplish proper atomization.
For light viscosity fluids, smaller orifice tips generally are desired. For heavier viscosity materials, larger orifice tips are
preferred. Please refer to the chart below.
Note: Do not exceed the pump's recommended tip size.
The
following chart indicates the most common sizes and the appropriate materials to be sprayed.
.011 - .013
Lacquers & Stains
1 00 Mesh Filter
.015-
.019
Oil & Latex 60 Mesh Filter
.021-
.026
Heavy Bodied Latex & Blockfillers 30 Mesh Filter
Fan widths measuring 8" to 12" are most preferred because they offer more control while spraying and are less
likely to plug.
PROBLEM
Spitting
gun
Gun
will
not
shut
off
Gun
does
not
spray
PROBABLE
CAUSE
1.
Air
in
system
2.
Dirty
gun
3.
Needle
assembly
out
of
adjustment
4.
Broken
or
chipped
seat
1.
Worn
or
broken
needle
&
seat
2.
Needle
assembly
out
of
adjustment
3.
Dirty
gun
1.
No
paint
2.
Plugged
filter
or
tip
3.
Broken
needle
in
gun
REMEDY
1.
Inspect
connections
for
air
leaks
2.
Disassemble
and
clean
3.
Inspect
and
adjust
4.
Inspect
and
replace
1.
Replace
2.
Adjust
3.
Clean
1.
Check
fluid
supply
2.
Clean
3.
Replace
TROUBLESHOOTING SPRAY PATTERNS
PROBLEM
Tails
Heavy
centered
pattern
Distorted
pattern
Pattern
expanding
and
contracting
(Surge)
PROBABLE
CAUSE
1.
Inadequate
fluid
delivery
2.
Fluid
not
atomizing
3.
Insufficient
velocity
4.
Material
too
cohesive
5.
Tip
worn
past
pump
capacity
1.
Worn
tip
2.
Tip
may
be
chipped
1.
Plugged,
worn
or
chipped
tip
1.
Leak
in
suction
tube
2.
Not
enough
hose
3.
Tip
too
large
or
worn
14
REMEDY
1.
Increase
pressure
2.
Change
to
smaller
tip
3.
Clean
gun
&
pump
filters
4.
Reduce
viscosity
5.
Replace
1.
Replace
2.
Replace
1.
Clean
or
replace
1.
Tighten
2.
Use
a
minimum
of
50'
of
1/4"
high
pressure
hose
3.
Replace
with
a
new
or
smaller
tip