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Difference Between HVLP Spray Guns and RP Compliant Spray Guns

The Challenge - Hvlp vs Conventional Spray Guns / Hvlp vs Air Assisted Airless / Turbine, LVLP, RP Etc.


 
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challenge
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What is spray gun painting? Spray Gun Painting uses air to directly atomize and direct paint particles onto a surface. This paint gun or device sprays a coating of paint, ink, varnish lacquers etc. through a front orifice which is sized to match the viscosity of the material. i.e. the thicker the material the larger the exit or fluid nozzle or orifice. As apposed to brushes or other techniques, spray gun painting produces a flat superior flawless finish. It is not difficult to get a glass like finish. It really depends on how good your spray gun is. In otherwords, by investing in good equipment anyone can produce a flawless finish. As opposed to aerosol paint cans which are too expensive. There is not enough power in an aerosol can to truly atomize the paint as well as a "true spray gun".

HVLP
hvlp

HVLP is one of the most common and well supported technologies around. Many of the new literature and training techniques will use HVLP in their examples.

HVLP spray guns are designed to improve transfer efficiency. HVLP guns push paint particles at about half the velocity of conventional spray guns. While this means you have to spray closer to the surface, you gain by having your material actually get applied to the object instead of floating into the air.

The spray gun itself requires a lower pressure to atomize the paint i.e. (LP) by using a higher volume of air (HV) to atomize and propel the paint. The result is a higher volume of material hits the surface which reduces material consumption and air pollution. A general idea is that it takes two thirds of the coating on the substrate and one third into the air i.e. 65% or Greater transfer efficiency as mandated by the government for HVLP markings. Typically this means you need to use 8-20cfm to atomize the paint correctly with a min of a true 3 HP or 5HP peak motor. Luckily, we carry the low CFM gun models which consume from 3-8CFM that produce equal or even superior finishes to higher CFM gun models. Why? because it is more the design of the gun and the precise manufacturing techniques not the size of the air that matters. Please ask us at ask@spraygunworld.com

Does this mean there is no overspray? No, compressed air exiting the gun still pushes back and pushes solids away from the object being sprayed, just a lot less. It is estimated by the US EPA that typical material savings can well exceed 50% which is money in your pocket.

Traditionally, HVLP guns use more compressed air than conventional air spray guns, which means increased energy costs. Today however, HVLP guns use less cfm of compressed air than older HVLP guns and we currently carry the only "Green" Spray guns which consume 50% less power then their competitors, can operate on 110v compressors and yet deliver the same quality of finish.

HVLP guns due to their softer spray are great for applications where the operator needs a high degree of control at the gun.

advantages

High finish quality

Great Material Savings

EPA and Government Approved

One of the most common application methods - easier training and support

advantages

Slower working speed and a smaller fan
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Larger Compressors Required
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Lower atomization of clear coats
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Problems with thicker paints
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LVLP
Low Volume Low Pressure

CPR

The Japanese have brought us LVLP. This technology cuts down on overspray and has a very soft fan pattern. Perfected by the Japanese, these guns often have a better finish quality than HVLP and as mentioned, super low overpsray levels - this means great material savings with no compromise in finish quality vs HVLP.

LVLP Spray Guns utilize a lower volume of air when compared to HVLP equipment. This further concentration of air power at the head, increases the transfer efficiency with more paint ending up on the surface while lowering compressor air requirements - at low as 5CFM in a full size gun.

advantages

Among the lowest overspray levels you can purchase as much as 80%+

Great Material Savings

Superior Finish Quality Similar to Reduced Pressure with some besting HVLP

advantages

Slow application speed similar to HVLP

Typically Smaller Fan Patterns in the 8"-10" range

Most people do not know about them because they are newer to the market than HVLP with some notable exceptions ask us at ask@spraygunworld.com

We will be happy to teach you about these guns, please drop us a line at
ask@spraygunworld.com

 

 

Great for:

Metallics

EPA Facilities

Slower Painters

Close to surface painters

Great for:

Clear Coats

Lower air consumption with no compromise on finish quality

Artist Control and slimline designs

   

 

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