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Specialist suppliers to
the Blast Cleaning &
Coating Industry

Blast-One Weekly Tips
Tip #108
What blast pot are you going to use?

Starting up on some new projects this spring? Wondering how you can finish them faster? You will only blast as fast as your blast pot will allow you. 5-10% of the cost of a job, will determine your productivity and efficiency for the next 6 months.

1. How many blasters will be blasting?

Calculate how many blasters you will have on the job. We recommend that you always have one spare outlet in case you need to do maintenance on another outlet or employ another blaster. Having a spare outlet means you can “hot-swap” if one outlet goes down.

2. What abrasive type are you going to use?

Abrasive type matters because of the bulk density and particle size of different abrasives. For example a small 6.5 cuft pot will last 25 minutes with steel grit, 30 minutes with slag and 90 minutes with Garnet. You always want your pot to be able to blast for one hour with all blasters going, before having to refill.

3. Use high flow air valves

Many blasting operators don’t realise that 3 out of 4 blast pot manufacturers use air valves that have restricting elements and elbows inbuilt into their products. This causes pressure loss, which will hinder your productivity and blasting speed.

Rule of thumb: 1psi pressure loss = 1.5% efficiency. This means that a poorly manufactured Air Valve worth $200, which loses 3psi, can reduce the efficiency of your entire blast project by 5%.

4. Use an air dryer not a moisture separator

Most blast pots come standard with a small moisture separator. These separators become pressure loss traps within 2-3 months, if we see them, we always say “Rip them out.” However, the benefit of dry air cannot be overstated. Instead of a moisture separator we would recommend that you buy a separate air dryer that is specifically designed to remove moisture from blasting air.

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