It is now popular to use the term "engineered" air nozzles for compressed air nozzles for blow-out applications. But what is an engineered nozzle? The original closed aero-engineered nozzle was a conical shape that utilized the "conda" effect to attract the surrounding air and convert the pressure into flow by removing the atmospheric air and the compressed air from the nozzle. The market is full of replicas and different physical sizes, but are they really designed? The size, the angle of the hole, and even how the air flows in and out of the air nozzle are essential. This can be easily demonstrated by taking two similar conical nozzles from different manufacturers and testing them side by side. Even if they look similar on the outside, they can behave very differently, perhaps louder (or quieter) and another more powerful (or weaker). A truly engineered version will take into account both internal and external flow characteristics. But these tapered designs generally provide the greatest "flow" amplification.
However, for most applications, force is more important, so a high force-to-air (CFM) ratio is essential. A "bullet" shaped fin-shaped nozzle with holes between the fins seems to provide the best force CFM better than a conical nozzle. The bullet shape still has a conda effect to accelerate the outside air to produce more flow. As with the old design, the number of holes, their size, the overall shape and the design of the fins are essential, but also the way in which the air flows inside. Replicas of these bullet-shaped nozzles also appeared, but few came close to the original design, as they were poorly reproduced and not designed. As with conical nozzles, this can be quickly confirmed by taking two similar-looking nozzles from two manufacturers and comparing the force generated by each nozzle at the same line pressure. Replicas rarely do this.
What is an engineered air nozzle!
A few years ago, the so-called Laval effect nozzle appeared on the market, which used an hourglass-shaped outlet to accelerate the outflow of compressed air. However, it is doubtful that for higher force CFM ratios they are more practical than using a conda-effect nozzle, which is implausible if not close to blowing out the target. Noise is another factor in this nozzle.
The bullet-shaped nozzle developed by the nozzle series in which the air outlet nozzle is oriented in such a way that the force CFM can be increased by about 10% compared to the best competitive nozzle and make it more effective at longer distances. This is a truly engineered nozzle where all factors, both internal and external, are taken into account. At the time of writing, the available air sizes are 1 4 , 1 2 , but 4, 5 and 6 mm small nozzles are waiting.
So, when looking at an engineered nozzle, take a close look at the actual force cfm, at what distance and pipe pressure to adopt the specifications, and their effectiveness distance to ensure that it is truly designed for your application.