Car body HVLP guns use a large volume of air and operate at low pressure. The advantage of painting with a spray gun and spraying at low pressure is to have a better transfer of paint to the support. Here's what to help you choose a satisfactory spray gun : a low pressure spray gun. A gun has a product inlet (the cup) and an air inlet (the compr...
Read moreCar body HVLP guns use a large volume of air and operate at low pressure. The advantage of painting with a spray gun and spraying at low pressure is to have a better transfer of paint to the support. Here's what to help you choose a satisfactory spray gun : a low pressure spray gun. A gun has a product inlet (the cup) and an air inlet (the compressed air hose). Through its nozzle, it sprays and atomizes an air/paint mixture.
In fact, the old HPLV materials, on the contrary, operate at high pressure : a large part of the paint bounces on the support and this results in a non-optimal product transfer rate, and a waste of product.
Example : 1 Liter sprayed = 0.5 Liter on the support.
Be aware, they need a bigger compressor compared to conventional paint guns. In any case, it is necessary to have sufficient flow and pressure, only to carry out the painting job correctly and achieve an optimal metallic, or for example glossy, finish.
Since HVLP guns are greedy in air, and less in paint, a pressure which is too low, or which drops during work, will cause real defects, or at least a poor quality of finish : by example a dry film having a surface that is not smooth, not taut, speckled or with an orange peel effect. It can even cause color differences when painting metallic or transparent colors.
Knowing how to use a bodywork paint gun is quite simple... Knowing how to paint is another story ! It involves connecting the air, pouring the paint into the cup, then learning to adjust the various buttons on the gun, each of which is used to adjust a variable, depending on the task to be accomplished: small jobs or heavy work. wingspan.
With an HVLP, you will need a little more air pressure, with a pressure level of 2.5 to 3.5 bars, when spraying various primers and primers.
Indeed, these are thicker, more viscous. In addition, the important thing for these preparatory steps is to spray as much product as possible quickly without worrying about a perfect finish !
Normally, one should refer to the instructions of the particular paint or varnish being used. Thus, on each technical sheet, there are the recommended pressure measurements.
In general, 2 to 3 bars. Attention ! Everyone is free to adjust the dilution mixtures, and their air pressure according to their preference, their style, and also according to the temperature / the season !
How to identify, differentiate and make the right choice between the types of bodywork paint guns ? You have to understand that you can do a good job with any gun, if you have the right paint and the right gesture, the right choice and above all the gun that meets your needs, the frequency of use , the type of products we are going to use and what we intend to paint !
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