Troubleshooting - Spray Patterns
condition
Possible cause
correction
A. Tails
Inadequate fluid delivery.
Fluid not atomizing correctly.
Increase fluid pressure. Change to small
tip orifice size. Reduce fluid viscosity.
Reduce hose length.
Clean gun and filter(s). Reduce number of
guns using pump.
B. Hour glass
Inadequate fluid delivery.
Same as above.
C. Distorted
Plugged or worn nozzle tip.
Clean or replace nozzle tip.
D. Pattern expanding and contracting
(surge)
Suction leak.
Pulsating fluid delivery.
Inspect for siphon hose leak.
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.
E. Round pattern.
Worn tip.
Fluid too heavy for tip.
Replace tip.
Increase pressure. Thin material. Change
nozzle tip.
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