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7.4
Spray Patterns
Problem
A.
Tails
B.
Hour glass
C.
Distorted
D.
Pattern expanding and
contracting (surge)
E.
Round pattern
PowrTwin Plus DI
Cause
1.
Inadequate fluid delivery
1.
Inadequate fluid delivery
1.
Plugged or worn nozzle tip
1.
Suction leak
2.
Pulsating fluid delivery
1.
Worn tip
2.
Fluid too heavy for tip
GB
Solution
1.
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.
1.
Same as above.
1.
Clean or replace nozzle tip.
1.
Inspect for suction hose leak.
2.
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.
1.
Replace tip.
2.
Increase pressure. Thin material. Change nozzle tip.
29
Troubleshooting
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