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5
Operating Instructions and Parts Manual
Pre-Operation (Cont.)
4. Loosen the air cap locking ring one
or two turns. This will feather the
top and bottom of the fan pattern
and slightly reduce the fan pattern
size.
COATINGS
COATING PROPERTIES:
Coatings are a
blend of resins and additives to create
a product that will provide a protective
and beautifying surface to your work
piece. Different resins have different
properties. It is important to use the
correct coating to achieve a desired
result. Manufacturers of coatings can
control the resin solids content,
production viscosity, sheen, color, flow-
out enhancement and other
properties. Some products offer ways
to adjust the coating properties such as
speeding up or slowing down the
drying time, adding catalysts to
strengthen the molecular bond or
adding flattening agents to lower the
sheen. Manufacturers will often give
some guidelines on how to thin their
product for spray application.
There are many different types of
spray equipment in use. Coating
manufacturers cannot address all of
them. Make sure you know about
your spray equipment. Make sure to
use the correct fluid viscosity to
produce the best possible results.
YOUR CHOICE OF COATINGS AND
VISCOSITY: Extremely thin, watery or
light bodied fluids such as inks, aniline
dyes and oil stains can generally be
used straight from the can. Most water
based finishing products are also
formulated to be used straight from
the can without thinning with a 3
stage or larger turbine. Most other
coating products will need to be
thinned anywhere from 10% to 50%
depending on the available air
pressure of the turbine model and the
www.chpower.com
HVLP Paint Sprayers
HV2100, HV2105
properties of the coating selected (see
Table 4).
HVLP TURBINE PROPERTIES: Each
turbine unit offers the finisher a
maximum operating pressure. This
pressure is determined by the size and
output of the unit you have selected.
The maximum available pressure will
have a direct bearing upon the
viscosity of the fluid that you choose to
spray. Atomizing pressure and fluid
viscosity directly relate to the efficiency
of the equipment operation and the
quality of the results that you will
achieve.
The available air volume and pressure
at the air cap will meet the delivery of
fluid coming out of the nozzle to
create a fine mist called atomization.
This mist travels directly to your work
piece where it blends together to form
a connected wet film. Achieving a
smooth, level surface will depend on
the proper relationship between
available atomizing pressure, the
viscosity of the coating being applied
and the properties of the coating.
USING LATEX PAINT:
Although your
turbine spray system is best suited to
spray Class A Finish coatings such as
lacquers, enamels, urethanes,
varnishes, waterbornes etc., you can
spray latex house paint if you follow a
few simple rules:
1. It is necessary to thin some latex
paints. This will vary from as little as
5% to no more than 20%. This will
depend on the model turbine you
are using and the quality of the
paint used.
2. It is necessary to use a larger nozzle
and needle set in the spray gun (2.0
mm or 2.5 mm).
3. It is recommended that a latex
conditioner, Floetrol, be added to
aid flow-out. If unable to find this
product, locate one that is labeled
“latex enamel” or “HVLP
compatible.” These products are
available at local paint stores.
Turbine Size . . . . . . . . . . . . . . 4 stage
Unrestricted Pressure . . . . . . .7.0 psi
Coating Types Light-Heavy
Viscosity Materials
Turbine Performance
Table 2
Tip/Needle Size Application Air Cap
.75 mm (.0295) Inks, dyes, stains, extremely thin viscosity HV104505AV
HV104520SV fluids, water based finishes
1.0 mm (.039) All purpose, thin lacquers, thin enamels, HV104505AV
HV104521SV water based finishes, automotive, marine,
airplane finish
1.5 mm (.059) Catalyzed lacquers, conversion varnish, HV104505AV,
HV104522SV primers, automotive, marine, airplane, finish A.5297
varnish, high viscosity industrial coatings,
urethanes, enamel
2.0 mm (.079) Thinned latex paint, multi-spec, heavy A.5297
A.5220-2 primers, butyrate, nitrate dope, high visosity
industrial coatings
2.5 mm (.098) Thinned latex paint, multi-spec, solvent A.5297
A.5221 adhesives, wax based paint strippers
Table 3 - Needle, Nozzle, and Air Cap Combinations
Nozzle, Needle, and Air Caps