DP-Airless                                  

Dino-Power Airless Paint Sprayers Blog

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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!

Review of five turbine HVLP sprayers

Clockwise from top left: American Turbine AT 950, Campbell Hausfeld HV 3000, Lemmer T-55, Wagner 2600, Apollo 700.

For Chris Minick’s comments on these tools and for their specs and ratings in this test, see below.

American Turbine AT 950
Pros: The AT 950 is the most compact, portable system of those tested. The gun is made of metal, and the system has an air-reducing valve to regulate atomization pressure.
Con: The air hose is slightly stiff.

Apollo 700
Pros: The 700 is the most comfortable sprayer to use. It has an extremely flexible air hose, filters are easy to replace, and the plastic handle stays cool during use.
Cons: On the downside, the 700 has no air-reducing valve to regulate atomization pressure, and it produces a spray pattern that’s not elliptical. Also, I found the manual to be poorly written.

Campbell Hausfeld HV 3000
Pros: The HV 3000 has a convenient built-in hose-storage rack on the turbine, and an interchangeable fluid nozzle and fluid needle are supplied. The system also has an air-reducing valve to regulate atomization pressure.
Cons: The air hose on the HV 3000 is located at the top of the gun, making the unit awkward to use. The trigger is located too far forward for comfortable use, and a squared-off grip adds to the discomfort. The air hose spews a high concentration of plasticizer vapors during use. The air cap causes an irregular spray pattern, and the gun produces a large volume of overspray. Overall, the unit has poor transfer efficiency. The spray-gun cup of the unit tested was corroded out of the package.

Lemmer T-55
Pros: The T-55 is an extremely comfortable sprayer to use, and it comes with a well-written, informative instruction manual. Of the units tested, the T-55 has the best turbine filtration. The sprayer comes with a viscosity drip cup and is equipped with a 14-ft. power cord.
Cons: The T-55 has a slightly stiff air hose and no air-reducing valve.

Wagner 2600
Pros: The 2600 is a well-balanced sprayer with an industrial-quality, nonbleeder gun. The sprayer has a flexible rubber air hose, which makes the unit easy to maneuver. The system has an air-reducing valve to regulate atomization pressure and achieves very fine atomization. The 2600 had the least amount of overspray in the test. For convenience, the spray gun is stored in the turbine housing.
Con: The only problem with the 2600 is that it has small turbine filters.

turbine hvlp sprayers

Model Apollo 700 Lemmer T-55 Campbell Hausfeld HV 3000 Wagner 2600 American Turbine AT 950
Price $499 $375 $399 $499 $495
Turbine info
Amps 10 8 12.5 11 8
Stages 2 2 3 3 2
Diameter 5.7 in. 5.7 in. 5.7 in. 5.7 in. 5.7 in.
Air output
Per manufacturer 112 cfm 55 cfm 65 cfm 80 cfm 52 cfm
Measured at hose 23 cfm 25 cfm 38 cfm 40 cfm 31 cfm
Measured at gun 11 cfm 15 cfm 13 cfm 15 cfm 13 cfm
Air pressure
Per manufacturer 4.5 psi 3.9 psi 6 psi 6 psi 4.25 psi
Maximum 3.75 psi 3.5 psi 5.25 psi 5.75 psi 3.5 psi
Atomization 2.8 psi 2.5 psi 4.25 psi 4 psi 2.8 psi
Temperature
Measured at hose 134°F 104°F 126°F 112°F 99°F
Measured at gun air cap 114°F 88°F 115°F 84°F 85°F
Spray gun info
Type Bleeder Bleeder Bleeder Nonbleeder Bleeder
Hose connection Handle Handle Top Handle Handle
Fluid nozzle orifice size 1mm 1.4mm General purpose 1.3mm 1mm
Gun body (material) Aluminum Aluminum Plastic Aluminum Aluminum
Gun cup (material) Aluminum / Teflon Aluminum Aluminum Aluminum Aluminum
Air-reducing valve No No Yes Yes Yes
Transfer efficiency 60% 65% 50% 67% 69%
Overspray 17% 14% 34% 11% 16%
Atomization Fine Fine Coarse Very fine Fine