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Operations & Parts Manual
Operation
HVLP Gravity Feed Spray Gun
HVLP (High volume low pressure) spray gun supply low
pressure through the air cap which make the spraying softer,
easily controlled and less overspray in high transfer efficiency.
Includes adjustable fluid, pattern and air controls. Designed to
provide equal atomization and partial size for all kinds of surface
painting. Stainless steel needle and nozzle accommodate a
variety of coatings. Precise air cap set. Lightweight, ergonomic
design and easy trigger pivot reduce operating fatigue.
Begin spraying. Always keep the gun at right angles to the work.
Keep the nozzle about 6 to 12 inches from the work surface.
Grip the gun keeping perpendicular with spraying area then
move it parallel for several times, Stopping gun movement in
mid-stroke will cause a buildup of paint and result in runs. Do not
fan the gun from side to side while painting. This will cause a
build-up of paint in the center of the stroke and an insufficient
coating at each end.
Trigger the gun properly. Start the gun moving at the beginning
of the stroke BEFORE SQUEEZING THE TRIGGER and
release the trigger BEFORE STOPPING GUN MOVEMENT at
the end of the stroke. This procedure will blend each stroke with
the next without showing overlap or unevenness.
The amount of paint being applied can be varied by the speed of
the stroke, distance from the surface and adjustment of the fluid
control knob.
Overlap strokes just enough to obtain an even coat.
NOTE: Two thin coats of paint will yield better results and
have less chance of runs than one heavy layer.
Use a piece of cardboard as a shield to catch overspray at the
edges of the work to protect other surfaces.
The desired pattern and fine atomization can be easily
obtained by regulating the Pattern Adjusting Knob, Fluid
(PAINT) Adjusting Knob.
PATTERN ADJUSTMENT: Turning Pattern Adjusting Knob to
the right until tight will make spray pattern round, or turning left
make spray pattern ellipse.
The spray pattern of the gun is variable from round to flat
with all patterns in between.
NOTE: To reduce over spray and obtain maximum
efficiency,
always
spray
atomization air pressure.
Fluid (PAINT) ADJUSTMENT: Turn the Paint Adjusting Knob
clockwise will decrease the volume of fluid output and
counter-clockwise will increase fluid output.
6
with
the
lowest
possible
FAULTY SPRAY
PATTER
CAUSE
N
Dried material inside
port
"A"
restricts
passage
of
air.
Greater flow of air
from cleaner side-port
"B" forces fan pattern
in direction of clogged side
Dried material around
the outside of the fluid
nozzle tip at position
"C"
restricts
the
passage of atomizing
air at one point through the
center opening of air nozzle
and results in pattern shown,
this pattern can also be caused
by loose air nozzle.
A split spray or one that is
heavy on each end of a fan
pattern and weak in the middle
is usually caused by
(1) too high an atomization air
pressure, or
(2) by attempting to get too
wide a spray with thin material.
(1) Dried out packing around
material needle valve permits
air to get into fluid passageway.
This results in splitting.
(2) Dirt between fluid nozzle
seat and body or loosely
installed fluid nozzle will make
gun split.
(3) A loose or defective swivel
nut on siphon cup or material
hose can cause spitting.
Model No. CAT827
( and how to correct it)
CORRECTION
Dissolve material in side-ports
with thinner then blow gun clean.
Do not poke into openings with
metal instruments
Remove air nozzle and wipe off
fluid tip, using rag wet with
thinner. Tighten air nozzle.
Reducing air pressure will correct
cause (1).
To
correct
cause
(2),
material control to full position by
turning to left. At the same time,
turn spray width adjustment to
right. This will reduce width of
spray, but will correct split spray
pattern.
To correct cause
(1).
back
knurled
nut
place two drops of
machine
packing,
nut and tighten
with fingers only. In aggravated
cases, replace packing.
To correct cause (2), remove fluid
nozzle (F), clean back of nozzle
and nozzle seat in gun body using
rag wet with thinner, replace
nozzle and draw up tightly against
body.
To correct cause (3), tighten or
replace swivel nut. (G).
open
up
(E)
oil
on
replace
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