The Spray Gun

It is with no doubt in saying that a spray gun is a very indispensable tool especially if the correct finishes are applied to it. There are several spray guns in the market today that one can easily choose from. While this is the case, it is imperative to know the specific type that you want which you know will work best for you. However, coming up with such can be quite daunting especially if you do not have the know-how of how to go about it. There is no need to worry about if you have no clue of how well you can choose a spray gun. This is simply because this article has been designed for you and all you have to do is to read the steps provided which will help you in making a perfect purchase.

Firstly, you need to put into consideration how spraying you intend to carry out.  If the spraying is intended for home use, it doesn’t have to be expensive as compared to those used in most factories.
When choosing a spray gun, it is important to consider which type of cup you want for your tool. The main aim of the cup is to supply the gun with finish and it comes in three main types. As such, it is worthwhile for you to select a type that you know will work for you perfectly during your spraying process.

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The four forms of the spray gun function in somehow a different manner to give one the desired results. First and foremost for the pressure guns, fluid is pressurized thus enabling it to flow out. As for siphons, air moves inside to create a siphon that retrieves paint from its reservoir. The gravity feed on the other hand makes use of the force of gravity to allow paint to flow into the air stream. Last but not least, the HVLP guns as they are commonly known function similarly to the siphon and gravity guns. They are specially made to make use of low air pressure to release a large amount of paint. Its low overspray will lead to a high transfer ratio of paint to a given surface and this is an advantage. Other parts of this device are the reservoir which is a cup for holding paint. It mainly holds paint to allow atmospheric pressure through a pinhole vent. The four forms of the gun can hold varying quantities of paint. However the air cap is the part that does the real task. It contains well drilled holes to help produce the best pattern. There are also other parts that facilitate proper functioning of this device and they include the fluid needle and fluid tip.

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A spray gun is a device that aids in painting. As the name suggests, it actually helps you to spray paint. It has two main passageways of which one is for air and the other one for paint. This device will work efficiently if one takes a little more time to be patient when using it. Take for instance the Pneumatic spray guns that can help you get a smooth finished surface if you take time to use it well. Most people get poor results when they use it simply because they do not really know what it takes to use such. The spray guns come in four categories mainly pressure, siphon, gravity feed and high volume low pressure. The pressure and siphon are the two forms that have been used by many for ages and are the most efficient. All these guns have specific components that must function jointly.

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Electrostatic is a term commonly used to refer to special coating application equipment developed in 1938. An electrostatic spray gun therefore uses electrostatic painting. When using electrostatic painting, the electrostatic coating application covers the material around the substrate ensuring even thickness of the coating. It is best for uneven surfaces like poles, porous materials, fences, carvings and many more.

Electrostatic painting is economical because it saves paint and has little overspray. When you opt to use it you can have about 90 percent transfer efficiency. Another advantage is the fact that almost anything can be sprayed electrostatically. Non conductive pieces can be sprayed electrostatically too by putting an applicator and a conductive surface in between the piece.

The non conductive pieces that can be painted electrostatically include, playground equipments, restroom partitions, office furniture just to mention but a few. The non conductive materials could be pretreated with conductive spray coatings to ease the painting process. However, other items have sufficient carbon to be sprayed electrostatically. Waterborne paints are the best paints for painting electrostatically but it requires isolation of the paint supply system from people.

Caution must be taken when carrying out electrostatic painting because any person in the spray area can be electrocuted. Besides, in case of improper grounding of objects there could be static sparking which then leads to a fire or electric shock. To check on the voltage of an electrostatic gun you can use Electrostatic test equipment kit. Some of these spray guns also have a built in control and alarm system thus making them more convenient for use.

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This is another type of spray gun that is ideal for those that want all the benefits that come with using the HLVP. The only exception to this is that it is for less air requirements.  This device compensates for limited amount of air with the use of a precision air cap. The precision air cap acts like tiny sharp knifes that will cut your material. This works best for automotive and wood painters with small compressors to enable them achieve a smooth finish.

The LVLP, as it is commonly known also has low overspray levels and this is an advantage. It is possible to operate an LVLP spray gun at pressures below 10 psi. However its air cap has to be pushed a bit high for proper atomization. It is very economical because little overspray will be produced; thus, allowing you to use less paint and other forms of environmental hazards. LVLP guns work for you professionally, since they allow you to spray and have a nice finish and still provide good control. This is why it is popular among woodworkers who do not have a booth or those with smaller compressors and paint keenly while taking their time. It is also preferred by mobile workers who mostly spray outdoors.

The HVLP is the most commonly used gun but some still prefer the LVLP because it has a softer spray and if well maintained it is quite efficient. The major disadvantage of this spray gun is that it has a reduction in speed and a slight reduction in its fan pattern width. However for most woodworkers this is something they can deal with. The LVLP also requires a high level of maintenance. If one fails to observe its cleanliness some imperfections could arise that in turn affect the atomization quality. The cleanliness is something one can deal with if you want your LVLP gun to last longer.

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There are numerous questions that arise often regarding the spray gun especially the HVLP that is mostly used hence the need to learn a few important tips about this device. The HVLP guns usually spray paint that is thicker with less air. The main problem is that the paint droplets from this spray gun are quite big and create an orange peel on the surface and this is not pleasing.

There is a chemical that helps to ensure that any blemishes and dirt particles are removed. There are chemicals specially formulated with thinners so that paint flows out each drop at a time before the paint settles. You will also need to use thinners that are also designed for varying temperatures. Novice painters are always offered with recommended air pressures for use on their guns. Many instructions offered to novice painters talk about low pressure measured at the front part of the gun.

Low pressure simply means pressure ranging from 8 to 10 psi. It is important to note that pressure that comes into the guns need to be a bit higher than what many think of. In case it is recommended that you use 45 psi it means 45 psi at the gun as air enters into its end not at the compressor. The pressure will then drop drastically from the compressor to the gun. Most professionals however use this recommended air pressure with the trigger pulled and keep watch on their air pressure to drop and then stabilize. The biggest challenge with the orange peel and large paint drops is the fact that air pressure used by novice painters is quite low.

Professionals usually use one gun to apply primers and another for colors and clears only. The primers will cause wearing out of a paint gun within a very short time if used continuously. When using a spray gun you must reduce the amount of fluid coming out so as to reduce droplet size too. This in turn reduces the amount of paint coming out so you must apply the paint at a slow pace. Any increase in speed could lead to insufficient paint on some areas of a surface.

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