How Does HVLP Spray Gun Work?

HVLP spray guns are the most commonly used guns now a day. Most professional painters choose these guns to spray paint particularly to finish the final coat.

These guns are significantly appropriate for painting both exterior and interior surfaces because they can provide excellent coverage without producing any type of overspray and noise.

These guns generally use a separate air compressor. During work, this air compressor keeps the paint and air power away from each other. When they meet outside the nozzle, the paint is atomized and then spread on the surface in a smooth and even way.

HVLP paint guns are special devices used to spray paint at a little pressure that can be controlled easily. No other tools of painting can achieve such a smooth and consistent paint finishing.

So the professionals and newbies both like these guns more than other spray guns available on the market. But most of them don’t know how an HVLP spray gun works.

Operating Principles Of HVLP Spray Gun

The machines always work on some particular principles about which the users often don’t know. They just know to use the machine.

Operating Principles Of HVLP Spray Gun

That’s why when the painters talk about the operating system/ principles of HVLP spray guns they usually think about how hard is it to use an HVLP spray gun. So in this article, you will read about the ways, these spray guns work.

#1. Harmony Of Different Components

The painters must understand the harmony of different components of the spray guns. How do these parts link with one another and work collectively? Here look at them differently.

  • #1: The HVLP spray guns are the latest technology so they are very efficient than the other old technology.
  • #2: The fluid guns pressurize fluid to flow it out through a very small hole.
  • #3: The siphon guns pass airflow through a reservoir making low pressure which can suck paint and then split into little particles. These particles exit from the opening of the gun.
  • #4: The gravity-feed spray guns have the fluid reservoir placed on the top of the gun. The fluid comes down with gravity force and combines with an exiting jet of very high speed.

#2. Process Of Atomization

To understand the operating principle of the HVLP spray gun, you should learn about the process of atomization. The paint is available in the form of liquid, the paint sprayer changes this liquid into thousands of tiny droplets with the pressure of air.

These atomized droplets of paint spread on the surface and stick there in a smooth and even way. After drying, they look shining as a fine finish.

#3. Setting Air Pressure

The HVLP spray gun works properly at 30 psi to 50 psi inlet air pressure.  This is the recommended level of air pressure for these guns.

If you use more air pressure, the gun will atomize the paint more than usual which will cause overspray. Sometimes over atomization can cause orange peel due to dry soon.

#4. Setting Fan

The fan in HVLP spray guns usually determines the spray pattern. If you use a wide fan, it will decrease the amount of material which means spraying the same surface twice to achieve the desired result of a smooth finish.

#5. Setting Paint Flow

When using an HVLP spray gun for spraying paint, try to adjust the paint flow which depends on the type of paint used. If you have set it right, let it run at the same setting until you change the air cap.

#6. Setting Air Cap

In the operating system of the HVLP spray gun, the air cap setting is very important and the last component that determines the working of the gun.

There are many holes drilled with much accuracy which produce the unique pattern of paint on the surface. When the air enters these holes, it atomizes the paint and makes different patterns.

#7. Setting The Thickness of Material

How does a spray gun work when the material is thick enough to pass through the nozzle? The HVLP spray gun works better when the paint is diluted properly getting the right consistency.

If the paint is thick, or thin it mixes water or oil according to the quality of the paint. The performance of an HVLP spray gun depends largely on the right thickness level.


Keeping in view the operating principles of the HVLP spray gun, always check the following things.

  • Recognize the harmony of different components of the spray guns
  • Make the right adjustment to air pressure, fan, and fluid
  • Tighten the air cap, nozzle, and hose pipe properly
  • Take all self-protective measures like glasses, gloves, shoes, masks, etc.

Frequently Asked Questions

How Can I Get A Smooth Finish With An HVLP Spray Gun?

First apply a coat of primer, when it dries up, sand it lightly to make it ready for the next coat. Spray a second coat you will get a smooth finish.

Does The Paint Change Its Color By Thinning?

No, thinning paint does not affect the color if consistency remains, but you have to apply more coats.

How Can I Thin Paint For The HVLP Spray Gun?

Add 10 percent water and mix it thoroughly. If the paint gets the right consistency, it’s ok, but if it is still thick, add some more water and mix it again. More thinning can reduce the quality of the paint covering a surface.

Which Parts Of The HVLP Spray Guns Play A Vital Role In Their Working?

The nozzle, fan, air compressor, fluid tank, hose pipe, and needle are the important parts of the HVLP spray guns which play a vital role in its working principles.


There are many types of spray guns used in the painting industry. But most painters and professionals like HVLP spray guns.

Before using guns, it is very necessary to understand how to do HVLP Spray Guns Work. The painters must learn the operating system of the gun to use it properly and get the maximum benefit.

The air pressure, fluid control, fan setting, and viscosity level are the main thing that every user must know before using the HVLP spray guns.


Hi, Cristopher here. I have been working in the home improvement industry for the past 15 years, and I have developed strong expertise in spray guns and paint sprayers. I have a deep understanding of how these tools work and how to get the best results from them. In addition to my practical knowledge, I am also running this website dedicated to sharing tips and tricks for using spray guns and paint sprayers.

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