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Operation
312578J 7
Operation
Pressure Relief Procedure
1. Turn off the gun air supply.
2. Trigger the gun to relieve pressure.
Apply Fluid
1. Fill the cup with material. Do not fill past the
shoulder on cup.
2. Turn on the shop air to the gun. Set
atomizing pressure with the gun fully
triggered.
3. Adjust the pattern size and shape. See
page 6.
4. To achieve the best results when applying
fluid:
• Keep the gun perpendicular and
6 to 8 inches (150 to 200 mm) from the
object being sprayed.
• Use smooth, parallel strokes across the
surface to be sprayed with 50% overlap.
When using the HVLP spray gun, instead of a
conventional airspray gun, you may need to
use a slightly slower hand movement and
make fewer passes with the gun to coat a part.
This is due to the reduced spray velocity pro-
duced by lower HVLP air pressures, along with
a larger fluid particle size because there is less
air to blow off solvents than is produced by
conventional airspray. Take care to avoid runs
or sags as you spray.
Volatile Organic Compounds
(VOC) Regulation
In certain states, spraying solvents that release
VOCs into the atmosphere when cleaning
a spray gun is prohibited. To comply with these
air quality laws, you must use a cleaning
method that prevents the escape of VOC
vapors into the atmosphere. See Compliant
Cleaning Methods, page 9.
.
CAUTION
Excessive atomizing air pressure can
increase over-spray, reduce transfer
efficiency, and result in a poor quality finish.
Regulatory agencies in certain states
prohibit the operation of a spray gun above
10 psi (69 kPa, 0.7 bar) atomizing air cap
pressure.
See Troubleshooting, page 10, if you
experience an irregular pattern.
Clean air line filters as directed by the
manufacturer.