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 DP 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 DP 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!