How To Choose The Correct Spray Gun For Your Needs.

With so many different variables to consider when purchasing a spray gun for your project, it can often be difficult to know where to start. You'll find a huge range of different spray guns available, whether they be airless, gravity-fed, suction, or pressure fed, but you'll need to choose the one to best suit your requirements.

What is a spray gun?

Spray guns are like air brushes, but they generally use larger equipment and are used to cover bigger surface areas with an even coating of liquid. You will find there are hand-held guns as well as automated spray guns with interchangeable heads that allows for different patterns of spray, as well as high-end guns which can be customised and completely rebuilt.

Every air gun has an air compressor, paint basin and nozzle. When you press the trigger, the compressed air and paint are mixed to break down the paint particles. This is then released from the spray gun in a fine spray to cover your surface.

HVLP, LVLP or Conventional Spray Gun?

High volume low pressure (HVLP) guns allow a higher proportion of paint or coating to reach the target surface. Not only does this reduce the number of materials you are using, and wastage of materials, but it also helps to prevent unnecessary over-spray. These types of guns are often used for architectural coatings, interior decor, or furnitre finishing.

Low volume low pressure (LVLP) guns are practically identical to HVLP guns but are among the best and the most efficient guns on the market. This is because they minimise paint wastage and operate at a lower pressure, using a lower volume of air tan HVLP guns. This decreased the amout of air consumed whilst increasing the proportion of air that reaches your target surface. However, one disadvantage of LVLP guns is that they are normally more expensive than other types of spray guns.

Select the Right Nozzle for the Job

There is a wide range of different nozzle types to choose from, but the three most common are flat steam, hollow cone and full cone nozzles. The type you choose will depend on the project you are working on. For example, for a fine finish over a larger area, a full cone nozzle may be the best option, whist for a smaller area and a more precise result, you may be best selecting a flat stream nozzle.

Consider the CFM Rating of your Spray Gun

You might see the CFM rating mentioned on spray guns and wonder exactly what that is. The amount of air needed to complete a project is measured in Cubic Feet per Minute or CFM for short. This amount can vary greatly ut all compressors will have a CFM rating, norally shown in the following way: 16CFM @ 90 PSI. This Rating is the output level of the compressor tank, so the actual CFM at the gun can vary depending on the diameter and length of hose and fittings means you will get more CFM at the gun for more precise results.

Consider the Viscosity of Paint moving through your Spray Gun

Whilst viscosity is generally measured as low, medium or high you may want to check technical information for your paint as a specific spray gn may be recommended. Some guns are more suited to heavy viscosity coatings. Generally speaking, the finish you are looking for willa ffect your choice of gun. Bear in mind that a conventional gun uses twice as much paint as an HVLP gun.

What are your production Requirements?

In other words, how fast fo you need your gun to spray? Using larger air caps and fluid nozzles can speed up your productivity. The higher the CFM of the air cap, the heavier the viscosity fo coating it is able to atomise. For high volume painting projects, using a pressure pot to feed your spray gun is ideal, giving you greater air pressure control For the ability to paint continuously, a diaphragm or fluid transfer pump may be best. Low viscosity paints and small-scale projects can use a gravity or syphon feed spray gun. In some cases, you may find an airless spray gun is the best option.

Consider the diversity of your Spray Gun

Think about how often you ae going to use your gun and the types of projects you will be working on. When it comes to spray guns for sale, it is often worth investing more in a high-quality gun such as a Graco Spray Gun, as these generally have more choice of fluid nozzles and air caps and can usually be totally rebuilt. Lower cost guns suffer from limited setups and are often not rebuildable.

What Spray gun do we Recommend?

There are many guns on the market that all do a fantastic job for the cash. You need to consider what is important to you. For example, if you need to minimise wastage and paint a lot like a conveyor line then overall an electrostatic gun may be fore you. If however, you are looking for routine reliability, less chance of blockages which increase downtme and a great finish, then Iwata Spray uns really do take some beating! They have been designed to contain fewer parts. Fewer parts equal less to go wrong and less to get in the way of a good finish. The parts are built from high quality materials and would be easily comparable to Devilbiss and Wagner style products out on the market now. If you are just doing a little spraying such as small indoor furniture, then a cheap gun that can be cleaned out with thinners should work just fine.

Examples of Gravity Feed Spray Guns, Pressure Fed Spray Guns, Suction Fed Spray Guns and Electrostatic Spray Guns

Gravity Feed - Iwata W400 Bellaria Spray Gun

For a Gravity Feed Spray Gun, the best gun we would recommend is the Iwata W400 Bellaria. The Iwata W400 Bellaria is a sprayer that comes with a lot of technology aimed at achieving a high quality, high-performace paint sprayer. This spray gun offers superior performance, quality, and the use of the latest industry technology. It offers a compact yet sensitive paint sprayer that is perfect for clear coats and finishes. Although it is smaller than your typical gravuty fed HVLP sprayer, it still gives you the same power. The Iwata W400 Bellaria is a perfect choice for base and clear coats. It lays clear coats with precision.  Spray guns like the Iwata W400 Bellaria, works well with water-based paint and dense paints and are often recommended by professional painters.

Pressure Fed - Iwata AZ1 Spray Gun

For a Pressure Fed Spray Gun, the best gun we would recommend is the Iwata AZ1. The Iwata AZ1 has technology which allows even less experienced sprayers to obtain high quality and consistent finishing. The newly designed range of air caps develop a long and tulip shaped spray pattern with an extra fine particle distribution and very little overspray. This gun is very flexible, with it being ideal for commercial vehicle refinishing and all industrial paints.

Suction Fed - Iwata W200

The Iwata W200 Integra Suction Gun is the gun we would recommend to use for a Suction Spray Gun. The Iwata W200 Suction Spray Gun is lightweight, full size, has low air volume, superior atomization and is a general purpose spray gun with high transfer efficiency control. It is designed for easy maintenance with few deeper and coarser thread pitches on the air cao, meaning only one and a half turns is required to remove the cap for cleaning. The Iwata W200 is the perfect gun for challenging jobs in the Industial paint application industry.

Electrostatic Spray Gun - Wagner GM5000

For an Electrostatic Spray Gun, We would recommend the Wagner GM5000 EA. The GM5000 automatic guns offer a soft and homogeneous spray jet for high coating quality and outstanding application efficiency. This gun is very flexible and can be sprayed in harsh and intense environments. This gun is used for solvent-based lacquers applications, with low-conductive solvent-based material, with integrated high-voltage cascade.

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