Applications of the Low-Pressure Spray Gun

Low-pressure spray gun refers to a spray gun with low air flow and low atomization pressure, which has lower atomization pressure during spraying (compared to HVLP, which is high air flow and low atomization pressure). The greatest benefit of using a low-pressure spray gun is the reduced compressed air consumption, eliminating the need for a higher-spec air compressor.

Advantages of LVLP technology

High Spraying Efficiency: Suitable for Large Workpieces and High-Output Applications

Before adjusting the spray gun parameters, first turn on the compressed air and set the pressure regulator parameters, being careful not to exceed the maximum recommended value. Start a spray test to verify if the paint viscosity is appropriate; if it's too thick, add a small amount of matching thinner and stir well.

This step, though simple, is very important for spray results, so do not overlook it; otherwise, it can result in uneven film thickness, overspray, and paint waste.

Three Steps to Adjust Low-Pressure Spray Gun

Set the Corresponding Flow Rate According to the Nozzle Diameter

To achieve the best spray quality, it is recommended that the speed of paint particles be between 1.5-5.0m/s.

When using gravity and siphon sprayers, there is no need to adjust paint pressure.

When using pressure-feed spray guns (supplied by pump or pressure pot), appropriate spray flow can be obtained by adjusting the paint pressure.

Set Atomization Air

Choose the right air cap model (round spray pattern or fan spray pattern, and maximum spray width).

Once the air cap model is determined, set the atomization air by adjusting the air pressure adjustment valve on the spray gun handle.

We usually recommend (fully open) HVLP and LVLP settings of 2.0-2.5Bar.

Set the Spray Pattern Width

Close the spray pattern adjustment valve, and air will pass through the center of the air cap.

Open the spray pattern adjustment valve, and air will be distributed to both wings of the air cap, atomizing the paint.

Narrow spray patterns can save paint and are suitable for spraying the edges of workpieces and narrow areas.

By rotating the air cap 90°, the horizontal spray pattern can be switched to a vertical spray pattern.

In low-pressure spray gun applications, paint viscosity is also an important factor to consider, and high-viscosity paints should be avoided with low-pressure spray guns.