Long-term use of solvent-based paints accelerates spray gun seal wear because seals are constantly exposed to reducers, resins, hardeners, and aggressive cleaning solvents. These chemicals can extract plasticizers from rubber, swell soft seals, or harden packing materials. Once the seal loses elasticity, the spray gun may leak, trigger movement may become rough, and atomization may become inconsistent.
The most common problem is over-soaking. Many painters place the whole gun body into thinner after spraying. This may clean the fluid path, but it also attacks air valve seals, needle packing, cup gaskets, and trigger components. A professional cleaning process should flush the fluid passage, wipe the body, and clean the nozzle set without immersing sensitive parts longer than necessary.
A worn seal changes gun performance. Air can leak around the air valve, fluid can seep near the needle packing, and the spray pattern can pulse. With a LVLP Spray Gun, even small internal leaks can affect transfer efficiency because the gun is designed around controlled low-volume airflow. Maintaining the LVLP Spray Gun seal system is essential for stable fan shape.
Use compatible parts. PTFE or solvent-resistant seals usually last longer than standard rubber in solvent-heavy shops. When replacing seals, use the correct manufacturer kit and avoid forcing the needle through dry packing. Light lubrication on approved moving parts reduces friction, but do not over-lubricate because excess lubricant can contaminate the finish. The spray path must remain Residue-free.
Cleaning technique also matters. After spraying high-build primer or Gap-filling materials, flush immediately before the coating cures inside the gun. Dried primer around the needle can tear seals during trigger movement. For Gap-filling primer surfacer, use the correct nozzle size so the material flows without excessive pressure.
Inspect seals weekly in production environments. Check trigger feel, needle return, cup gasket condition, and air cap seating. Spray a test pattern before every refinishing job. A clean air spray gun with healthy seals will deliver a symmetrical fan, consistent atomization, and fewer finish defects.
Before storage, leave the gun clean, dry, and Residue-free. Good maintenance is cheaper than repainting a panel because of spitting, leaking, or pattern collapse.
color difference between front and side faces
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
