How Does an Airless Paint Sprayer Work?

How Does an Airless Paint Sprayer Work

The coming of airless sprayers has changed how we paint and decorate things. Besides being popular with DIYers and home users, these sprayers are also becoming a must-have for most professionals that paint a lot.

What makes these machines highly popular is they are more reliable than most other alternatives. Additionally, they are pretty easy to use and can help you paint large areas within a short time.

Here we provide more detail on this handy paint sprayer to help you understand how it works and why you need to give it a try.

What is an Airless Paint Sprayer?

An airless paint sprayer does not require an air compressor to function. Instead, these paint sprayers use an electric motor. The electric motor powers a pump that pressurizes and pushes the paint out of the gun through the tip.

Other components of these sprayers include the pressure control dial that regulates the fluid pressure and a manifold filter for catching debris to ensure it does not ruin the paint finish. Additionally, there is also a fluid hose for delivering a steady stream of high-pressure fluid.

How does an Airless Paint Sprayer Work?

Many airless paint sprayers use a piston and cylinder setup similar to what you get in vehicles. Here the piston is driven up and down by an electric motor in a repeated cycle. This cycle then causes pressure to build up inside the cylinder, with most models getting to at least 3,000 PSI.

When the pressure is released by pulling the trigger as you spray, it forces a fine mist of paint through the spray gun’s tip.

Airless sprayers have some one-way valves that force pressure in and keep it there, and each piston cycle adds more pressure and fluid to the system, which allows for continuous spraying.

Airless sprayers use sensors to monitor the pressure levels to ensure it remains in the safe levels. When the pressure starts to drop, the sensors switch on the electric motor to move the pistons and help build up more pressure.

Why Should I Choose Airless Paint Sprayer?

Why Should I Choose Airless Paint Sprayer

1. They are Highly Portable

One of the key reasons many professional contractors seem to prefer airless paint sprayers is that they are portable. There is no cumbersome air compressor to deal with, making this sprayer easier to pack and carry.

A typical airless paint sprayer will consist of the base unit, a spray gun with a nozzle, and a frame to hold everything together. Also, many models include some wheels to ensure that besides being compact, the setup is easier to push around when working.

2. Sprays Paint Fast

When you have a big project to tackle, an airless sprayer can be handy as it will allow you to finish the job faster, thanks to the higher spraying speed.

There are hardly any downtimes with these sprayers since you never have to wait for pressure to build up. The machine sensors ensure the pressure is always optimal, which speeds up the job for you.

Besides never having to wait for pressure to build up, the fact that this machine can deliver high pressure also helps speed up the job.

3. Cleaner and Smoother Finish

If you are highly concerned with the quality of finish you get, the airless sprayers are often the best bet as they consistently deliver clean and smooth finishes.

The finish you get is better quality than those that use air compressors, and you will need to do a minimal touch-up if any. All this is thanks to the working mechanism of these machines.


Airless paint sprayers provide a more efficient way of painting, and they can work well for both professional contractors and DIYers.

Instead of air compressors, these sprayers rely on an electric motor-driven piston to generate pressure. This setup makes them less bulky for portability and ensures you get a smooth and clean finish.


  1. How to Use an Airless Paint Sprayer – The Balance Small Business
  2. Airless Sprayers – HowStuffWorks: Home and Garden
  3. How Does an Airless Paint Sprayer Work? – Hunker