So, as far as this chart is concerned, not only does it tell me what nozzle size uses what amount of pressure, but it also gives me an efficiency indication.
So, the indication on there is less than a hundred psi and I start diminishing in efficiency as far as my blast operation is concerned.
So, it’s important to remember that when you get a compressor, make sure that it’s adequate to fulfill the requirement of the blast pot, the air prep, your breathing air helmet, and the blast nozzle in which you select.
So, say for example, I got a compressor that was ended up on site that was too small. Basically, all I need to do is come back in nozzle size.
Yes, it affects my productivity. Yes, I don’t do as much as I expect to do in a day. But more importantly, I’m still maintaining a blast pressure of around a hundred psi.
If you’re under a hundred psi, you’re wasting grit. You’re wasting your time. So, always keep that pressure up around the hundred psi.
There’s nothing wrong with going with the bigger nozzles after you go over number seven. There’s absolutely nothing wrong with increasing the air pressure up to a 110 to 115 psi.
What that does is it increases your productivity and makes the cut a lot more appropriate.