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HVLP Turbine Paint Sprayers - Questions and Answers
Q. What is the difference between HVLP (High Volume
Low Pressure) and Conventional Paint Sprayers?
A. With Conventional Paint Sprayers, the paint
spray gun is supplied with high pressure air at 40-80 psi. This
high pressure is used to break up the paint stream as it leaves
the gun and to propel the paint particles onto the part. Unfortunately,
due to this high pressure, much of the paint particles blow past
the parts or bounce off the parts. This is called "overspray"
and "bounce back", which is normal for conventional
paint spray equipment. The "transfer rate" of this
type of system is quite low, as most of the paint particles are
blown about the room, instead of onto the product. Low transfer
rates mean a considerable amount of airborne dust in the air,
a dirty environment and high paint and thinner consumption, in
addition to dust in the final finish.
Q. What is "Transfer Rate"?
A. Transfer rate is stated as a percentage and refers to the
amount of actual material (paint and thinner) that is applied
to the product being painted. Obviously, it is advantageous to
get as much material on the product as possible, with very little
material into the room, or into the air. While conventional paint
sprayers often have transfer rates of 25% to 35%, HVLP paint spray users
report transfer rates of over 65%, depending on the product being
painted and spray techniques. Imagine the environmental and economic
benefits of using such a product. Often, paint savings alone
can approach 50%! Think of this the next time you pay over $100
for a gallon of paint. Due to this high transfer rate, in 1989,
the South Coast Air Quality Management District (which regulates
the Los Angeles area), added HVLP to its approved list of paint
spray systems. As most other paint spray systems cannot even
begin to reach this transfer rate, HVLP is widely accepted and
used in California and is fast becoming mandatory in other areas
of the U.S.
HVLP paint sprayers have a special type of paint
spray gun with precision orifices in the head of the gun that limit
the air pressure to about 4-5 psi. Due to this low pressure,
"bounce back" is almost eliminated completely and "overspray"
is greatly reduced. A savings of between 35% and 50% in material
cost is common. In addition, other savings realized are less
cleanup of the paint booth walls, floors and ceilings, as well
as increased life of paint booth filters and the fan itself.
EPA loves HVLP, and you will too! With a little practice, you
can turn out professional results fairly easily.
With the TP HVLP Turbine Paint Sprayer Series, in addition
to the above characteristics, incoming fresh air is filtered
and is slightly heated, due to friction as it passes through
the turbine fan. HVLP air is clean, perfectly dry and free of
oil vapors and other contaminants or problems that are fairly
common with compressed air systems. Since the air is slightly
heated, this warm air lowers the viscosity of the paint and improves
atomization and flow, resulting in a high gloss finish, with
an extremely smooth surface. You will want to experiment with
different nozzle setups for best results.
The Turbine is placed away from the immediate paint spray
area, so that a clean source of incoming air is supplied
on a continual basis. The air is supplied to the spray gun through
a 3/4" inside diameter flexible hose, capable of handling
the high volume. This hose should be at least 35 ft. long to
facilitate moving around the vehicle or object being painted.
This incoming air is cleaned by a 2-part filtration system as
it enters the turbine; and the air is propelled in large volume
(50-60 cfm), yet at low pressure to the spray gun. Thus, we have
a "high volume, low pressure" paint sprayer, which
can be used for any type of paint spraying, providing excellent
results. In addition to the high-gloss finish, the paint dries
faster, due to the warm air supplied by the turbine. HVLP paint sprayers can
be used with enamels, lacquers, stains, primers, acrylics, epoxies,
urethanes and two-component paints. In some cases, it is necessary
to change the nozzle setup; but, in most cases, adjustment can
be easily made at the gun itself. You will be amazed at the results
that you can obtain using a TP HVLP Paint Sprayer. 30-Day Shop Trial: if
you don't like this product for any reason, feel free to return
it for an immediate refund (less shipping -- subject to cleanup
charge). We hardly ever receive a returned HVLP paint sprayer, because everyone
loves this product!
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