One of the most common questions we get asked by sandblast operators is "what size blast nozzle do I need?" As with most things in the coatings industry, this questions does not have a cut and dry answer and there are variables to account for in addressing this question.
One of the most important (and often overlooked) variables when it comes to what size blast nozzle a customer needs is the size of the air compressor. When looking into the size of the compressor, one needs to check the CFM (Cubic Feet per Minute) that the compressor can put out. Basically, we need to know how much air your compressor can produce to ensure the nozzle will not be too big. Another large factor to take into account is what else will be running off the compressor. If the operator has a 185 CFM compressor and is running a sandblast hood (requires 20 CFM) they have roughly 165 CFM free for their blast nozzle.
In order to know what nozzle will be needed, the abrasive material being used is helpful. Nozzles are made up of different types of materials designed to handled multiple abrasives such as aluminum oxide, glass beads, coal slag and silica sand. Knowing the type of abrasive being used can help narrow down which type of nozzle recommended to the customer.
Knowing the type of application sounds like a no-brainer. However, it is helpful to know specifics of the application to pin point which nozzle the customer should use (i.e. some jobs require angled nozzles).
At Air Equipment and Repair, our number one goal is to get you the part you need at the best price possible. Knowing the CFM requirements, the abrasive materials being used, and the application of your blast project helps us help you.