Tribomatic Magnum Automatic Powder Spray Gun
12
E
2000 Nordson Corporation
All rights reserved
343 547A
Issued 8/00
Manual 37-37
Fluidizing Air Pressure
Set the fluidizing air pressure as specified in the manual shipped with the
Magnum control unit.
When properly fluidized, small air bubbles rise gently and uniformly to the
surface of the powder, making the powder look like it is boiling. If
necessary, adjust the fluidizing air pressure. In this state, the powder is
similar to a liquid, enabling the powder pump to easily transport the
powder from the hopper to the spray gun.
Fluidizing Air Pressure
Results
Too low
Powder flows heavily and inconsistently
Too high
Powder boils violently and flows
unevenly with possible air pockets in the
powder stream
Flow-Rate Air Pressure
See Figure 2. Flow-rate air transports a powder and air mixture from the
feed hopper through the powder feed hose (1) to the spray gun.
Increasing the flow-rate air pressure increases the amount of powder that
the gun sprays and may increase the thickness of the powder deposited
on the part.
Flow-Rate Air Pressure
Results
Too low
Powder sprays unevenly or produces an
inadequate film build
Too high
Powder velocity increases, causing
excessive film build or overspray which
reduces transfer efficiency and wastes
powder
Excessive flow-rate air pressure
accelerates the build-up of impact-fused
powder in the gun or pump, or causes
premature wear of the gun and pump
parts in contact with the powder
Keep the flow-rate air pressure to a minimum. This will reduce
overspray, which lessens
S
the amount of recovered and recycled powder
S
wear on system components such as pumps, spray guns, and filters
S
maintenance costs
