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16 PowrCoat
GB
Troubleshooting
7.3 Spray Patterns
Problem Cause Solution
A. Tails 1. Inadequate uid delivery 1. Fluid not atomizing correctly:
Increase uid pressure. Change to smaller tip orice
size. Reduce uid viscosity. Reduce hose length.
Clean gun and lter(s). Reduce number of guns using
pump.
B. Hourglass 1. Inadequate uid delivery 1. Same as above.
C. Distorted 1. Plugged or worn nozzle tip 1. Clean or replace nozzle tip.
D. Pattern expanding and
contracting (surge)
1. Suction leak
2. Pulsating uid delivery
1. Inspect for suction hose leak.
2. Change to a smaller tip orice size. Install pulsation
dampener in system or drain existing one. Reduce
number of guns using pump. Remove restrictions in
system; clean tip screen if lter is used.
E. Round pattern. 1. Worn tip
2. Fluid too heavy for tip
1. Replace tip.
2. Increase pressure. Thin material. Change nozzle tip.