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Coating Industry

Blast-One Weekly Tips
Tip #40
How does a worn blast nozzle reduce the speed of abrasive?

Sometimes we feel that we are actually going to save money by hanging onto our old blast nozzle as long as we can to get the most out of it.

The reality is that the actual cost of a blast nozzle is extremely small in comparison to the total project cost. It has been proved that the performance of a nozzle can actually affect your cost of blasting and your total project cost significantly!


How a blast nozzle works:

1. Air/abrasive enters the nozzle and is compacted and increases speed as it passes though the orifice.

2. From the orifice the air/abrasive enters the exit venture section of the nozzle which widens out progressively.

3. As the air travels along the exit venturi it expands increasing its speed significantly.

4. As the air increases speed, so does the abrasive.

Therefore, If the nozzle is worn the abrasive cannot reach its maximum potential speed and full productivity is not reached.

Blast Nozzle

Nozzle wear can be measured accurately with a nozzle size analyser gauge (INH131-PBAG). This enables you to know exactly when to replace your nozzle and not lose time and money.

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