If your spray gun produces an uneven fan pattern or sprays more heavily on one side, it's a clear sign that something is wrong with airflow, nozzle alignment, or cleanliness.
The most common cause is a partially clogged air cap. The tiny holes in the air cap are responsible for shaping the spray pattern. When one side is blocked by dried paint or debris, the spray becomes uneven. Remove the air cap and clean it thoroughly using solvent and a soft brush-never use metal tools that could damage the holes.
Another possible issue is a damaged or misaligned nozzle. If the nozzle is worn or not seated correctly, it disrupts the symmetry of the spray. Reinstall it carefully or replace it if necessary. Using a durable LVLP Spray Gun Multi-Purpose Long-Lasting model helps reduce the likelihood of uneven wear.
Check the needle as well. A bent or worn needle can affect paint flow distribution. Replacing it ensures proper alignment and consistent spraying.
Air pressure imbalance can also cause one-sided spraying. Make sure your compressor is delivering steady pressure and that there are no leaks in the air hose. Consistent airflow is critical for a balanced spray pattern.
Improper adjustment of the fan control knob may also be the culprit. If it's partially blocked or incorrectly set, the spray pattern becomes uneven. Adjust it while testing on a surface until you achieve a uniform fan.
Routine maintenance is the key to preventing this issue:
Clean the air cap after every use
Inspect and replace worn nozzles and needles
Ensure proper assembly and alignment
Maintain stable air pressure
Choose reliable tools like an LVLP Spray Gun Multi-Purpose Long-Lasting
Fixing a one-sided spray issue is usually quick once you identify the root cause. With proper care and adjustments, your spray gun will return to delivering smooth, even coverage.
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Wenzhou Sico Spraying Tech.Co.,Ltd
Add: Daqiao Industrial Area,Beibaixiang Town,Yueqing,Wenzhou,Zhejiang
Zip code:325603
Tel:+86-577-67307836
Email:sales@sicotools.com
Mobile/Wechat：+86-13777716892
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These SK-300 spray guns are fantastic! Love the no oring design, less leakage and easy maintenance. The atomization is perfect for automotive painting. Highly recommend!
Spiro Pittas,AustraliaPRD-817 gives me precise control over color, gloss, and gradients-art-level finish without top-tier pricing”
Olie-PaintzPRD-817 gives me precise control over color, gloss, and gradients-art-level finish without top-tier pricing”
Olie-PaintzPRD-817 gives me precise control over color, gloss, and gradients-art-level finish without top-tier pricing”
Olie-PaintzPRD-817 gives me precise control over color, gloss, and gradients-art-level finish without top-tier pricing”
Olie-Paintz
