Husky HDS500 Instructions D'utilisation page 2

Operating Instructions
General Safety
Information (Cont.)
• Do not spray acids, corrosive
materials, toxic chemicals,
fertilizers or pesticides. Using
these materials could result in
death or serious injury.
• When spraying and cleaning,
always follow the instructions and
safety precautions provided by the
material manufacturer (Refer to
MSDS).
• Do not overreach. Keep
proper footing and
balance at all times.
Proper footing and
balance enables better
control of the spray gun in
unexpected situations.
• Stay alert. Watch what you are
doing and use common sense
when operating the spray gun. Do
not use the spray gun while tired
or under the influence of drugs,
alcohol, or medication. A moment
of inattention while operating the
spray gun increases the risk of
injury to persons.
tOOl USe anD Care
• Do not use pressure
that exceeds operating
pressure of the spray
gun or any of the parts
(hoses, fittings, etc.) in
the painting system.
• Over pressurizing the spray gun
is able to result in bursting,
abnormal operation, breakage of
the spray gun or serious injury to
persons.
• Always verify prior to using the
spray gun that the air source has
been adjusted to the rated air
pressure or within the rated air-
pressure range.
• Check for misalignment or binding
of moving parts, breakage of
parts, and any other condition that
affects the spray gun's operation.
If damaged, have the spray gun
serviced before using. Many
accidents are caused by poorly
maintained spray guns. There is a
risk of bursting if the spray gun is
damaged.
• Avoid unintentional starting.
Be sure the trigger is off before
connecting to the air supply. Do
not carry the spray gun with your
finger on the trigger or connect
the spray gun to the air supply
with the trigger on.
• Disconnect the spray gun from
the air source before, changing
accessories, cleaning, servicing
or storing the spray gun. Such
preventive safety measures
reduce the risk of starting the
spray gun unintentionally.
• Failure to install appropriate
water/oil removal equipment may
result in damage to machinery or
workpiece.
• Always use a pressure regulator
on the air supply to the spray
gun.
Introduction
The spray gun is a vital link in any finishing
application. In addition to operating the
spray gun properly, techniques of surface
preparation and paint preparation must be
understood. These instructions will explain
the differences among various spray
technologies and serve as a guide in the
proper operation and techniques of spray
painting. Refer to the Replacement Parts
Manual for model specific information.
Currently, there are three basic types
of spray guns: Siphon, Pressure, and
Gravity feed (See Figures 2-5). The spray
gun type used depends primarily on the
application and the size of the project.
These types of spray guns can be either
conventional air spray or High Volume
Low Pressure (HVLP).
Spray GUn termS
feeD – Method used to bring paint
into the gun for spraying.
preSSUre feeD – Method of paint
feed where a canister or paint tank is
pressurized to force paint to the gun.
Either internal or external mix air caps
are used with this method. Pressure
feed is generally used for spraying heavy
bodied paints or for large size projects.
SIpHOn feeD – Method of paint feed
where atmospheric pressure creates a
partial vacuum to siphon paint to the
gun. Only external mix air caps are used
with this method. Siphon feed is used
with light bodied paints.
GravIty feeD – Method of paint
feed similar to the siphon feed method.
However, the cup is inverted to create a
positive fluid pressure at the nozzle.
mIx – The mixing of paint and air
when spraying.
2
HDS500, HDS750
Internal mIx – Process where the air
and paint are mixed inside the air cap
just before being sprayed. This method is
best for heavy bodied, slow drying paints
and can only be used with the pressure
feed method. Do not use fast drying
paints with internal mix. The paint will
dry inside and quickly clog the air cap.
external mIx – Process where the air
and paint are mixed just after leaving
the nozzle. This type of mix should be
used for fast drying paints and when a
high quality finish is needed.
BleeDer/nOn-BleeDer – Indicates
whether air flows through the gun
continuously or as the trigger is pulled.
BleeDer – In this mode, air passes
continuously through the gun whether
spraying or not. This mode is generally
used when the air is supplied by a
continuously running compressor that
does not have a tank.
nOn-BleeDer – In this mode, air
flows only when the trigger is pulled.
This type of operation is used with a
compressor equipped with a tank or
with a large factory air system.
vISCOSIty – A measurement of the
resistance of the flow of a liquid.
atOmIzatIOn - Conversion of liquid
to spray droplets (mist).
pattern COntrOl knOB – Used
to form the proper pattern (size and
shape) of paint as it is sprayed from the
gun to the work piece.
flUID COntrOl knOB – Used to
control the amount of paint being
mixed with air.
paInt tank – An auxiliary pressurized
paint reservoir that allows continuous
spraying of large amounts of paint
without stopping for refills as with a
canister. It also allows using the spray gun
at any angle or orientation.
COnventIOnal vS. Hvlp
Conventional spray guns use a much
higher air cap pressure to atomize paint
than HVLP spray guns. This results in more
overspray and a lower transfer efficiency.
HVLP, electrostatic and airless processes
are currently the only compliant spray
methods that meet the strict 65% transfer
efficiency criteria required by some
air quality management districts. This
enhanced transfer efficiency results in a
significant material savings compared to
conventional spraying. Check local, state
and national regulations that may be in
effect before performing any spraying
operations.