Too few blast media particles provide poor productivity but too many can also have the same effect as the air to blast media ratio becomes too heavy or imbalanced.
Symptoms of poor settings are too much air, not enough blast media or too much blast media, or not enough air.
- To optimise, first close off the blast media pinch valve, referred to in our introduction Part 2 allowing only the maximum flow of compressed air at the desired constant pressure to the nozzle.
- Next, open the blast media pinch valve very slowly until an even constant flow of blast media is achieved.
- By over feeding the blast media to the air, a “slug” or high quantity of slow moving blast media will be discharged.
- In order to overcome Point 3 above, the pinch valve requires to be slowly closed until you find that smooth and consistent delivery point.
- It is easy to recognise this point after which, lock the pinch valve in position to retain integrity.
Click to read Tip No. 6 On the Venturie/Suction delivery system, alternative regulation requires attention
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Shot Blasting Technical Manager
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