Husky hds790 - Manual (Page 2)

27 Sp
Lista De Repuestos
No. de Número
Ref. Descripción de Pieza Ctd.
1 Anillo de seguridad -- 1
2 Arandela ▲ 1
3 Ensamblaje de la tapa de aire DH795200AV 1
(Incluye el artículo 1)
4 Anillo retención ▲ 1
5 Boquilla de fluído PH016800AV 1
6 Cuerpo de la pistola No se aplica 1
7 Tuerca del empaque de fluido,
9 mm Hex.
▲ ■ 1
8 Empaque de fluído ▲ ■ 1
9 Ensamblaje del control de patrón DH751800AV 1
10 Perilla de control de fluído ● 1
11 Resorte del sistema de control ▲ ● 1
de fluído
12 Aguja de fluído PH01700AV 1
13 Cuerpo, control de fluido 8 mm Hex. ● 1
14 Anillo en O ▲ ● ◆ 2
15 Tapa de la válvula de aire ◆ 1
16 Resorte de la válvula de aire ▲ ◆ 1
17 Ensamblaje de la válvula de aire ◆ 1
18 Cuerpo de la válvula de aire, ◆ 1
6 mm Hex.
19 Empaque de la válvula de aire ▲ ◆ 1
20 Tuerca del empaque de la ▲ ◆ 1
válvula de aire
21 Entrada de aire 6,4 mm (1/4 inch) NPS, DH795400AV 1
15 mm Hex.
22 Tapón de aire DH795500AV 1
23 Entrada de fluído, 9,5 mm DH785100AV 1
24 Gatillo DH753300AV 1
25 Travesaño del gatillo ▲ 1
26 Empaque en E ▲ 1
27 Filtro a presión PH015800AV 1
28 Ensamblaje de la tapa de gravedad PH015900AV 1
29 Tuerca de la tapa ▼ 1
30 Tapa a presión ▼ 1
31 Tapa del sistema de ventilación ▼ 1
32 Cuerpo del sistema de ventilación ▼ 1
33 Gancho para colgar la unidad PH016400AV 1
34 Anillo en O ◆ 1
35 Juego de tapa de prueba HVLP
de 1,4 mm
DH790200AV 1
36 Juego de tapa de prueba HVLP
de 1,6 mm
DH790300AV 1
JUEGOS DE PIEZAS DISPONIBLES PARA LA REPARACIÓN
Y EL MANTENIMENTO
▲ Empaques/reacondicionamiento DH750100AV
■ Empaques de fluído DH750200AV
● Mecanismo de control de fluído DH750300AV
◆ Válvula de aire DH750500AV
▼ Ensamblaje de la tapa del envase PH016600AV
Nécessaire de capuchon d’air
d’aiguille/buse de 1,6 mm
(instalación opcional)
DH790100AV
No. de Número
Ref. Descripción de Pieza Ctd.
Manual de Instrucciones y Lista de Piezas Pistola Pulverizadora HVLP Alimentada por Gravedad
2
Operating Instructions and Parts Manual HVLP Gravity Feed Spray Gun
Keep
hose
away from sharp objects. Bursting air
hoses may cause injury. Examine air
hoses regularly and replace if damaged.
7. Always use a pressure regulator on
the air supply to the spray gun.
Failure to
install
appropriate water/oil removal equip-
ment may result in damage to machin-
ery or workpiece.
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 tech-
nologies and serve as a guide in the proper
operation and techniques of spray paint-
ing. Refer to the Replacement Parts
Manual for model specific information.
SPRAY GUN TERMS
Atomization - Conversion of bulk liq-
uid to spray droplets (mist).
Bleeder – In this mode, air passes con-
tinuously through the gun whether
spraying or not. This mode is generally
used when the air is supplied by a con-
tinuously running compressor that does
not have a tank.
Bleeder/Non-Bleeder – Indicates
whether air flows through the gun con-
tinuously or as the trigger is pulled.
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.
Feed – Method used to bring paint into
the gun for spraying.
Fluid Control Knob – Used to control
the amount of paint being mixed with air.
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.
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.
Mix – The mixing of paint and air when
spraying.
Non-Bleeder – In this mode, air flows
only when the trigger is pulled. This
type of operation is used with a com-
pressor equipped with a tank or with a
large factory air system.
Paint Tank – An auxiliary pressurized
paint reservoir that allows continuous
spraying of large amounts of paint with-
out stopping for refills as with a canister. It
also allows using the spray gun at any
angle without causing paint to drip.
Pattern Control Knob – Used to form
the proper pattern (size and shape) of
paint as it is sprayed from the gun to
the workpiece.
Pressure Feed – Method of paint feed
where a canister or paint tank is pressur-
ized to force paint to the gun. Either
internal or external mix air caps are used
with this method. Pressure feed is gener-
ally 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.
Viscosity – A measurement of the
resistance to the flow of liquids.
CONVENTIONAL VS. HVLP
Conventional spray guns use a much high-
er 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 com-
pared to conventional spraying. Check
local, state and national regulations
that may be in effect before perform-
ing any spraying operations.
HVLP spraying is a growing trend in the
finishing industry due to its environmen-
tal friendliness. By definition, dynamic
air pressures in the air cap must be 10 psi
or less to qualify 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 spray-
ing parts with
recessed areas.
Spray Gun Set-up
The pressure for atomization is controlled
at the air source. The amount of fluid is
adjusted by the fluid control knob, the
paint viscosity and the air pressure.
The gravity feed cup screws onto the top
of the gun body creating a positive fluid
pressure in the nozzle (See Figure 2).
Preparation
1. Thoroughly mix and thin paint in
accordance with the paint manufac-
turer’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 card-
board target. If material still appears
too thick, add a small amount of
thinner. THIN WITH CARE!! Do not
exceed paint manufactuer’s thinning
recommendations.
Figure 1
Conventional
HVLP
Figure 2 - Gravity Feed Cup Set-up
Filtered,
Regulated
Air Source
General Safety
Information
(continued)