Teach you how to choose the nozzle of the spray gun
What is the first consideration?
The nozzle and air cap are the core of the manual spray gun!
The air cap determines the shape of the spray fan (flat, round, hollow cone...). In order to ensure that each nozzle can bring the best spray effect, all our series of nozzles are manufactured in our production plant. We pursue precision machining processes to ensure a continuous and stable flow rate and spray paint shape. The nozzles are carefully selected high-quality materials (stainless steel, tungsten carbide...) to ensure a longer service life in continuous production.
There are many factors to consider when choosing the right nozzle size for different spray applications. In order to maximize the effectiveness of your spray gun, you need to make sure that the nozzle size and spray fan shape are selected correctly. If you use the wrong size, it will have a big impact on your operation, and your paint may be clumpy or uneven. The air cap will determine the fan shape of the spray: flat, hollow cone, and round.
When you choose the nozzle size that produces the best spray effect, there are two main factors to consider.
First, check the coating to be sprayed. Thicker coatings require larger pore sizes than thinner coatings. For example, the primer is usually thicker than the other paints that match it, so you should use a nozzle with a 1.7 or 1.8 mm aperture. Most paint labor unions choose to keep the aperture in the range of 1.2 to 2.0 mm, except for some special professional applications.
Secondly, consider your construction surface area, which determines that your spray gun needs an appropriate fan width during production, that is, the atomization fan shape when the paint leaves the nozzle. Airless spray guns can control the fan width better than traditional air spray guns because the paint of the airless spray gun passes through the nozzle without air atomization. Airless nozzles have a great influence on the width and shape of the fan. Most ship projects are composed of large surfaces, so a wide fan shape can increase the coverage of the spray, and when the spray gun approaches the surface of the workpiece during the spraying process, it will not cause too much paint to accumulate. Smaller surfaces require smaller fan widths to reduce overspray. This also makes the paint farther away from the surface and there will not be too much paint peeling off, because the paint fan is more concentrated.
According to your application, how to choose the nozzle size for the spray gun?
For air spray system, when the unit of coating particle velocity is 1.5m/s to 5m/s, the best spray quality can be achieved. The following chart will help you find the best nozzle for your application (for example, for a flow rate of 120cc/min, the best nozzle choices are 0.9 and 1.0).
We are also trying to expand the nozzle range, the following are the most common sizes for most paints:
0.8: Fine spray, suitable for thinner coating or masking
1.2: Fine finishes, clear lacquer and color correction (for wood applications)
1.4: Transparent paint, primer or one layer of paint are optional
1.6: Suitable for most general paints, general-medium viscosity paints and coatings. Warning: It is not ideal for thinner coatings because of the risk of orange peel.
1.8: Primer that needs quick application
2.2-2.5: Resin, gel coat, thicker paint
The nozzle is the core of the spray gun: Unfortunately, even if we use the best materials, the nozzle of the spray gun cannot be used permanently. How often the nozzle starts to wear depends on the type of paint (quality) you are using and the project you are working on. In the long run, we recommend that you use high-quality paint, you will get the best surface effect and save costs. If you apply more pressure to the nozzle, the wear will also be faster.
How to extend the service life of the nozzle?
Do not use any metal tools to clean the nozzle
Clean the nozzle and spray gun after each use
Use a soft brush to clean
If you are using grit paint, filter it with cheesecloth first to reduce grit
Always spray with the lowest possible pressure
Make sure not to be too close or too far away from the sprayed workpiece. A good rule of thumb is that for most projects, you need to stand 8 to 12 inches away from the work you are doing.
The above are some of my sharing, I hope to help you, if you have other questions or cooperation intentions, you can contact us, we look forward to working with you. >>click here
