Preparation - Husky HDS500 Instructions D'utilisation

Operating Instructions
Introduction (Cont.)
HVLP spraying is
Conventional
a growing trend
in the finishing
industry due to
its environmental
friendliness. By
HVLP
definition, dynamic
air pressures in the
air cap must be 10
psi or less to qualify
figure 1
as HVLP. A soft, low
velocity pattern
is produced which increases control and
reduces "bounceback" and overspray
(See Figure 1). For these reasons, HVLP is
also well suited for spraying parts with
recessed areas.
types of Spray Gun
Set-Ups
(COnventIOnal anD Hvlp)
SIPHON FEED CUP SET-UP
The air pressure for atomization is
controlled by the regulator on the air
source. The amount of fluid is adjusted by
the fluid control knob, the paint viscosity,
and the air pressure (See
Figure 2). The siphon cup must be vented
to the atmosphere.
Fluid Control
knob
Filtered,
Regulated
Air Source
figure 2 - Siphon feed Cup Set-up
PRESSURE FEED CUP SET-UP
Air pressure for atomization is
controlled by the regulator on the
air source. The fluid pressure is set
by adjusting the cup regulator. The
amount of fluid is also adjusted by the
fluid control knob (See Figure 3).
This method is required for heavy
fluids and when using internal mix
nozzle spraying. This method generally
requires a special fluid tip, needle and
air cap set.
Water / OIl In COmpreSSeD aIr
All compressor pumps discharge some condensed water, oil or contaminates with
the compressed air.
ImpOrtant: This condensation will cause "fish eyes" to appear in the paint
job. Install appropriate water / oil removal equipment and controls as necessary
for the intended application.
Failure to install appropriate water / oil removal
equipment may result in damage to machinery or
workpiece.
Fluid Control
knob
Fluid Pressure
Regulator
Cup Pressure Hose
figure 3 - pressure feed Cup Set-up
PRESSURE FEED TANk SET-UP
This method is the same as the pressure
feed cup set-up except that the gun can
be oriented in any position independent
of the tank (See Figure 4). This method
is useful for medium production or large
scale spraying applications.
Air to Spray Gun
Fluid
Hose
Pressure Tank
figure 4 - pressure feed tank Set-up
GRAVITY FEED CUP SET-UP
This method is similar to the siphon
feed with cup except that the cup is
positioned above the spray gun body
(See Figure 5). This creates a positive
fluid pressure in the fluid nozzle.
3
Filtered,
Regulated
Air Source
figure 5 - Gravity feed Cup Set-up

preparation

1. Thoroughly mix the paint in accordance
with the manufacturer's instructions,
adding thinner where necessary. Most
materials will spray readily if thinned
properly. Strain material through
cheese cloth or a paint strainer. 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!!
Filtered,
2. Fill the canister about 3/4 full and
Regulated
start the air compressor.
Air Source
3. Set up a piece of cardboard or other
scrap material to use as a target and
adjust for best spray pattern.
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 6). Hand tighten
lock ring after adjustment.
Air Cap
Lock Ring
figure 6
HDS500, HDS750
Filtered,
Regulated
Air Source
Horizontal Fan
Vertical Fan