From time to time even the most experienced paint sprayer can have difficulties in applying industrial paint coatings. Find out more about some of the more common spray irregularities and how to solve them!
| Irregularity |
Cause |
Remedy |
| Tails |
 |
Inadequate fluid delivery
Fluid not atomising |
- Increase fluid pressure
- Change to larger tip orifice size
- Reduce fluid viscosity
- Clean gun and filters
- Reduce number of guns using pump
|
| Hour Glass |
 |
Inadequate fluid delivery |
- Same as A through to E above
|
| Distorted |
 |
Plugged or worn nozzle tip |
- Clean or replace nozzle tip
|
| Pattern Expanding & Contracting (surge) |
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Pulsating fluid delivery
Suction leak |
- Change to a smaller tip oriface size
- Install pulsation chamber in system
- Reduce number of guns using pump
- Increase air supply to air motor
- Remove restrictions in system, clean tip screen or filter if used
- Inspect for syphon hose leak
|
| Round pattern |
 |
Worn tip
Fluid too heavy for tip |
- Replace tip
- Increase pressure
- Thin material
- Change nozzle tip
|
| Spitting gun |
Air in system
Dirty gun
Cartridge out of adjustment
Packing gland too tight |
Inspect for syphon hose leak
Disassemble and clean gun
Inspect and repair cartridge |
| Gun will not shut off |
Worn parts
Cartridge out of adjustment
Dirty gun
Packing gland too tight |
Inspect gun, replace defective parts
Inspect and replace cartridge
Disassemble and clean gun
Loosen gland, oil needle, adjust |
| Gun does not spray any fluid |
Lost of air pressure
Suction leak
No paint
Plugged pump foot valve
Plugged filters or tip
Ball check valve stuck open |
Check for leaks and repair as required,
Inspect syphon hose leak
Check fluid supply
Remove, clean and inspect foot valve
Clean filters or tip
Clean and inspect pump ball check valve |