A Brief Comparison between HVLP and LVLP Spray Systems

06 January 2022

Manufacturers typically utilise different spraying systems to ensure that their parts and products possess the right finish. Some systems are designed to conduct finishing processes automatically, while others are specified to conduct the same processes manually.

Even though automatic spray systems have truly made the finishing processes easier and more convenient for many manufacturers, a huge number of businesses still maximise manual spray systems on their daily operations. Manual spray guns are often used by many manufacturers nowadays as they are affordable. They can likewise last for a long time thanks to their durable metal components. They are also versatile as operators can change their nozzles based on their finishing requirements.

When opting for manual spray systems, manufacturers like you can choose between HVLP and LVLP spray systems. Here is a brief comparison between the two mentioned spray systems.

HVLP Spray Systems

High volume low pressure (HVLP) spray systems utilise 10 to 25 cubic feet per meter (CFM) of air and convert it into a low pressure of 0.7 Bar or less. HVLP spray systems can maximise and process a huge volume of air since they are equipped with a larger air passage. They also have air caps that have numerous or huge atomising orifices around the fluid nozzles.

Through utilising a high volume of air, HVLP spray systems can achieve atomisation, reduce forward velocity, and generate a softer spray. Their softer spray can then help materials to stick to the parts, minimise air pollution, reduce material wastes, cut off cleaning and maintenance requirements, and save on operational costs. They can even work with various parts such as plastic, metal, and wood.

As for their drawbacks, HVLP spray systems cannot atomise thick coatings all the time. Additionally, some types of these spray systems can be expensive to purchase due to their quality characteristics.

LVLP Spray Systems

Low volume low pressure (LVLP) spray systems, alternatively, maximise 5 to 18 cubic feet per meter (CFM) of air and convert it into a high pressure of 2 Bar or less. While LVLP spray systems also possess a large air passage, their air caps are known to boast slightly smaller holes than those that are found on HVLP spray systems.

What is great about LVLP spray systems is that they can generate better atomisation than their counterpart. They can also provide better transfer efficiency, superior surface finish, higher viscosities, and higher flow rates. They can even work with difficult coatings, large parts and products, and high-value applications without consuming too much air and spending a lot of money.

One drawback of LVLP spray systems is that they cannot handle thick materials. They also work and operate slowly, which can hinder applications from being finished quickly.

If you need help in choosing the best manual spray systems for your application, you can call us at Epac Productions. We can assist you with all your surface finishing requirements, large or small, from the design stage through to full after-sales service and support.

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