Spray guns - everything you need to know

Basically, you choose a spray gun based on your material used or even the cost. But there are many other factors that influence your decision. For example, handling, wear, functionality and even design all play a role. Get an overview of the spray guns and their features here: from the types to the spraying process. Which is best suited for your work process?

Manual spray gun and automatic spray gun

Depending on your application, you can choose a manual or automatic spray gun.

Manual spray guns are well suited for one-off jobs in the broadest sense. Examples of work you can do with a manual spray gun are touch-up jobs, spraying smaller- to medium-sized areas, or decorative work. Of course, you can also work large areas, or within a batch or variety production, with a manual spray gun, but this can be very tiring. In addition, your results with a hand spray gun are often not accurately repeatable. Hand spray guns are available with a flow cup or in a material connection version.

For product your mass, batch, or variety production, an automatic spray gun is suitable. You can choose from a wide range of modular guns. The spray guns can be perfectly integrated into your or a plant. Above all, automatic spray guns are your guarantee for a reproducible and accurate result. Examples of work you can do with an automatic spray gun are marking and signing work or precision spraying.

Structure of a spray gun

Adjusting the spray gun

The air volume is adjusted via the air volume control. The spray jet width can be continuously adjusted on the round wide jet control. The regulation screw is closed for the round jet shape. For wide spray pattern the regulation screw is opened. Further parameters (material quantity) are determined via the nozzle size.

The spraying process

First, you fill your desired material into the material tank. From there, it is conveyed to the gun using the appropriate devices (hose, pump, etc.). In the material channel sits the material needle, which regulates the material flow. The atomizing air flows around the emerging material at the nozzle outlet and breaks it into small droplets. This is how your spray pattern is created. To initiate the atomizing air, pull the trigger forward a bit. Here, the air valve (valve cone) is pushed back. Now the air path is free (pre-air setting). When pulling further, the material needle is pulled out of the material nozzle and the material path is free. The working speed should be adapted to the jet width.