Graco EQ300C manual Blasting Tips, Blasting on Higher Surfaces

Blasting Tips

When first learning the effects of the blaster, get a better understanding of the results by starting at a shallow angle (closer to 0° than to 90°) and keep the nozzle approximately 16 in. (40 cm) from the application. Observe the results, then reduce the distance, steepen the angle, and adjust the blast regulator.

As the blast pressure is increased, slowly adjust the metering valve and watch the DataTrak to achieve 7-10 pump cycles per minute. See DataTrak Controls, page 7 .

NOTE: The heavier and smaller the abrasive particle (i.e. 80-grit), the more aggressive the results.

Operation

Blasting on Higher Surfaces

When blasting on a surface higher than the equipment, make sure that there is a length of blast hose on the ground equal to 10-20% of the height. The hose on the ground prevents unspent abrasive in the hose from back-filling the internal plumbing of the panel.

For example: When blasting 50 feet (15 m) straight up, use at least 10 feet (3 m) of blast hose on the ground before the blast hose goes up to the blasting height.

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