Operation
Pressure Relief Procedure
Trapped air can cause the pump to cycle unexpectedly, which could result in serious injury from splashing or moving parts.
1.Turn off air and fluid supply.
2.Hold a metal part of the gun firmly to a grounded metal pail. Trigger the gun to relieve pressure.
Apply Fluid
CAUTION
Excessive atomizing air pressure can increase overspray, reduce transfer effi- ciency, and result in a poor quality finish. Regulatory agencies in some states prohibit the operation of a spray gun above 10 psi (69 kPa, 0.7 bar) atomizing air cap pressure.
1.Turn on shop air and fluid supply to the gun. Set atomizing pressure and fluid pres- sure with the gun fully triggered.
2.Adjust the pattern size and shape. See page 8.
3.To achieve the best results when applying fluid:
•Keep the gun perpendicular and
6 to 8 inches (150 to 200 mm) from object being sprayed.
•Use smooth, parallel strokes across the surface to be sprayed with 50% overlap.
Operation
NOTE: See Troubleshooting, page 12, if
you experience an irregular pattern.
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 11.
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