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Also known as pneumatic spray guns, these painting devices are made of three basic components. The first one is the gun itself which sprays the finish onto the surface. Second is the cup or a pot that holds the finish that you are using. Last and most important is the power system that is responsible for atomizing the air and the substance. The principle behind every spray gun is almost the same. What differs is the location of the spray gun and the type of air compressor that you choose to do the job for you. How to Choose the Right Type of spray Gun? When it comes to spray guns, you have two choices – the High Volume Low Pressure Paint Gun (HVLP) and the High Pressure Spray Gun. They both differ in a function that is known as transfer efficiency, a term that refers to the amount of paint that is transferred on to the surface that has been selected for painting. With High Volume Low Pressure guns, low pressure compressed air is used to allow almost 65 percent of the finish to be transferred on to the surface. These spray guns are usually used to paint automobiles. With high pressure guns, the paint is just blown into the air allowing only 25 percent to reach the surface to be painted. This means that the latter is less efficient and results in a lot of wastage of the finish. So, it is advised that you use the HVLP spray gun whenever you decide to spray paint any surface. Choosing the Right Accessories The nozzles and feeds of a spray gun are its most important accessories. When it comes to the nozzle, choosing the right size is quite important. There is a range of nozzle sizes available starting from 1.0 mm, going up to 2.2 mm. The most preferred ones are usually below 2.0mm. The lower end of the nozzle size is only used when thinner materials are being used to paint. This includes stage paints, pearls and metallic paints. With a thinner nozzle, you get a good enough dispersion that can be used for clear coats. However, the nozzle size is dependent on the painting material that you use. You can consult the staff at the hardware store to choose the right size. As for the feed, you can choose between the gravity feed and the siphon feed. The gravity gun is a little more expensive but is highly useful when it comes to painting a tight space. Siphon guns, on the other hand are cheaper and tougher. They also carry more paint as the cup is larger with the siphon guns. The Right Compressor Lastly, the compressor is an important part of your spray gun. With these compressors, horse power is not the deciding factor. Understanding the pressure and volume considerations is necessary to make the right choice. If you are not an expert in spray guns and accessories, finding a good hardware store enables you to consult the salesmen and experts to help you choose the right one for the job. It is not necessary that you must have in depth knowledge about spray guns & accessories while painting, as there are a number of hardware stores in Perth that can help you with it. Visit this site for more details.
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