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CONDITION
POSSIBLE CAUSE
CORRECTION
TAILS
Inadequate fluid delivery.
Fluid not atomizing correctly.
Increase fluid pressure.
Change to smaller tip orifice size. Reduce fluid
viscosity. Reduce hose length.
Clean gun and filter(s).
Reduce number of guns using pump.
HOUR GLASS
Inadequate fluid delivery.
Same as above.
DISTORTED
Plugged or worn nozzle tip.
Clean or replace nozzle tip.
PATTERN EXPANDING &
Suction leak.
Inspect for suction hose leak.
CONTRACTING (SURGE)
Pulsating fluid delivery
Change to a smaller tip orifice size.
Install pulsation dampener in system
or drain existing one. Reduce number of
guns using pump.
Remove restrictions in system; clean
tip screen if filter is used.
ROUND PATTERN
Worn tip.
Replace tip.
Fluid too heavy for tip.
Increase pressure.
Thin material.
Change nozzle tip.
Troubleshooting Guide: Spray Patterns
