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Operating Instructions Gravity Feed Spray Gun
4
www.chpower.com
Preparation
1. Thoroughly mix and thin paint
in accordance with the paint
manufacturer’s instructions. Most
materials will spray readily if thinned
properly.
2. Strain material through cheese cloth
or a paint strainer.
3. Fill the canister about 3/4 full and
start the air compressor.
4. Set up a piece of cardboard or other
scrap material to use as a target and
adjust for best spray pattern.
5. Test the consistency of the material
by making a few strokes on a
cardboard target. If material
still appears too thick, add a
small amount of thinner. THIN
WITH CARE!! Do not exceed
paint manufactuer’s thinning
recommendations.
FAN DIRECTION
The direction of the fan (horizontal or
vertical) can be changed by loosening
the lock ring and turning the air cap 90
degrees (See Figure 3). Hand tighten
lock ring after adjustment.
PATTERN ADJUSTMENT
1. Adjust air pressure
to the spray gun
according to the
recommendations
supplied with the spray material.
This air pressure usually falls
between 40 - 60 psi.
Do not exceed
spray gun maximum
pressure.
Adjust air pressure with the trigger
pulled and air control knob (if
applicable) fully open. If reduced air
pressure is desired for some areas of
the spray job, use the air compressor
regulator or air control knob to reduce
pressure as necessary (See Figure 4).
2. Set pattern size to desired shape. For
full pattern, open pattern control
knob by turning counterclockwise.
For a round pattern, turn pattern
control knob clockwise (See
Figure 6).
3. Turn fluid control knob fully
clockwise until closed (See Figure 6).
4. Trigger a short burst while turning
fluid control knob counterclockwise.
Observe the spray pattern on the
target and adjust the fluid control
knob until the desired pattern
(atomization) is obtained (See
Figure 7).
If the spray is too fine (excessive
overspray), caused by too much air for
the amount of paint being sprayed,
reduce the air pressure or open the fluid
control to spray more material.
If the spray is too coarse (spitting globs),
reduce the amount of material with the
fluid control knob or thin the paint.
5. The fluid control knob can be used
to finely adjust pattern consistency.
Before spraying the workpiece, practice
a few minutes on a cardboard target to
ensure the pattern size and consistency
are set correctly.
40 psi
Min.
60 psi
Max.
Figure 3
Lock Ring
Horizontal Fan
Vertical Fan
Air Cap
Figure 4 - Air Adjustment on Spray Gun
Decrease
Air Flow
Air Control
Knob
Increase
Air Flow
Figure 5 - Gravity Feed Spray Gun
Air Cap
Fluid Packing Nut
Fluid Tip (Nozzle)
Trigger
Cup
Vent Hole
Pattern Control
Knob (location
depends on model)
1/4 inch NPS Air
Inlet Fitting
Air Valve
Packing Nut
Fluid Control Knob
Figure 6 - Pattern Size
Pattern control
knob
Fluid Control
Knob
Paint too
coarse
Correct Paint too
fine
Figure 7 - Pattern Consistency
(Atomization)