Graco AirPro 289028, Instruction & Parts Manual

Operation

312578M

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.