High-Volume Low-Pressure (HVLP) Spray Painting Systems
One of the three main methods of spray painting (along with conventional and airless), high-volume, low-pressure spray guns afford a wide variety of benefits for both the individual customer and the industrial or commercial sector. More commonly known as HVLP, these systems offer three styles of spray gun — broken down in our previous article Here — and are generally considered to provide the highest-quality finish available in spray painting.
In this article, we’ll give you a brief overview of HVLP, including the two different types, the overall benefits, and common uses. Let’s get started.
How does HVLP work?
High-Volume, Low-Pressure (HVLP) spray guns use a high volume of air to atomize and propel the paint, but at a relatively low air pressure—typically under 10 psi at the air cap. This lower pressure minimizes overspray and bounce-back, allowing more paint to adhere to the target surface. As a result, HVLP systems achieve a higher transfer efficiency—usually between 65% and 90%—leading to a cleaner, more precise application and a superior finish.
The Types of HVLP Spray Guns: Conversion vs Dedicated
The first type of HVLP system, commonly referred to as a conversion system, consists of a standard air compressor paired with a conversion spray gun. The gun reduces the high incoming air pressure from the compressor to below 10 psi at the air cap, meeting HVLP requirements. While this setup can be effective, it is generally less efficient and more energy-intensive than the second type of HVLP system.
The second type of HVLP system, known as a dedicated system, replaces the air compressor with a purpose-built turbine unit. This turbine uses a motor to drive one or more high-speed fans, generating the high air volume and low pressure needed for HVLP spraying. These systems are rated by the number of fan stages they contain — single-stage, two-stage, three-stage, and so on — with each additional stage increasing the system’s air output and pressure capacity.
Dedicated HVLP systems are typically more compact and portable than conversion setups and offer significantly greater efficiency, making them a preferred choice for both professionals and serious DIYers seeking a cleaner, more controlled finish.
What are the benefits of an HVLP?
In addition to the reduced overspray and smoother finish we mentioned before, HVLP guns eliminate moisture problems associated with other spray painting systems (thanks to the warm, dry air produced by the turbines) and result in faster paint curing and less overall waste.
HVLPs are small, compact, and portable, and the nature of the high-volume, low-pressure system means that the guns require less material for any given job, improving your efficiency and saving you money over time.
And for the eco-minded among us, it’s important to note that HVLP systems impart far less air pollution than other types of spray guns.
What can you use an HVLP gun for?
You can use an HVLP gun for any spray painting job you like, but they’re most commonly used for recoating aluminium joinery, wood and furniture finishing, interior finishing lines (architraves and doors), and auto / marine painting. They also have applications in the beauty industry (primarily sunless tanning) and in industrial and commercial finishing.
Not sure whether you need an HVLP spray gun or something different? Get in touch and tell me about the project(s) you have in mind, and I’ll make sure you get the right product.