Airless Sprayer Anatomy

An airless spray gun is made from several components and many individual parts which all working together to help make painting easier. An airless uses high pressure, rather than air, to atomize materials so they can be sprayed on to a surface. Knowing each part of airless sprayer will help you understand how it works and how to operate it in the right way.

Pump/Fluid Section

The main part of airless paint sprayer is the pump which is also called as the fluid section. It is what moves and pressurizes the material to be sprayed such as latex paint. The pump is the one who moves and pressurizes the material such as latex paint to be sprayed. In order to create a high pressure to atomize paints and other “sprayable” materials, airless pumps are normally made of hardened. Some fluid sections such as Graco’s Endurance Pumps have additional feature like their Chromex Rod for longer wear. Current Graco Endurance Pumps also come equipped with V-Max packings for longer life.


Second most important part is the motor, since motor will support the work of the pump to pump the power throughout the airless paint sprayer. Most airless paint sprayers use electric motors followed by gas engine driven sprayers. Some brands will offer motor warranty to guaranty their engine works well.

Drive Train

In order to work well, the motor should be connected to the pump. The drive train in an airless leads the power to where it needs to go, just like a transmission and axels in a car. This part usually has warranty to ensure other part work well with it.


Other part that you should know is hose, it gets the pressurized liquid out of the sprayer and to the gun & spray tip.


In the process of painting, we need to hold back the fluid until we need it, therefore to work the system we need to stay pressurized.


If you have a good control over your paint, so you don’t need to worry about any overspray, then it’s because of the spray’s tip turns out to work well. The spray tip manages both the spray-fan size and the amount of fluid that it allowed to come out. Due to this, you may need different tip sizes to serve different purpose of painting.

Pressure Control

There are two main types of pressure controls, electronic and mechanical. Since we can’t control pressure with the gun, hose or tip, we need a pressure control.

There are some other airless parts which function as addition parts to main components that you should be familiar with:


The piston part of the fluid section

Prime/Spray Valve

The switch valve that sets the airless sprayer mode to either Prime Mode or Spray Mode.

Return Tube

The tube that returns paint to the bucket during priming of the pump

Intake Tube

The tube that paint or other material to be sprayed is drawn into.

Manifold Filter

The filter within the sprayer which is the first line of defense against large particles in the paint.

Gun filter

The filter inside the handle of the gun


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