Compressed Air Test

Using Sharpe’s High Volume
Air Adjusting Valve 36AAV Comp. #3310

This test is intended to give four elements of information concerning compressed air.

• Static air pressure at the gun.
• Dynamic air pressure at the gun.
• Air pressure drop from the compressed air source to the point of use.
• Adequate or inadequate compressed air supply.

Procedure for the test

1. Static air pressure at the gun:

• Attach the air valve to the gun.
• Connect the air supply to the air valve.
• Read the gauge. This reading will be the static reading (make a note of the reading).

2. Dynamic air pressure at the gun:

• Set the fan and the material control knobs in the wide-open position.
• For the dynamic reading, depress the trigger to the full back position or to the material stroke. While the trigger is in the full back position, read the gauge (make a note of the reading).

3. Air pressure drop from the compressed air source to the point of use:

• Subtract the dynamic reading from the static reading. The total is the pressure drop from the compressed air source to the point of use.

4. Adequate or inadequate compressed air supply:

• While the gun is set in the wide-open position and the trigger in the full back position, set the gauge at the desired pressure. Hold this for two (2) minutes.
• If there is no pressure drop, there is adequate compressed air to operate that particular gun.
• If the gun is unable to maintain the needed air pressure, do not attempt to spray. Spraying with inadequate air can only lead to unsatisfactory refinish work.