Compressed air operated air knives can be utilized as a barrier in some applications to prevent contaminants from one area getting into another area. This is possible because of the laminar flow produced by the air knives. The small amount of compressed air exists the air knife gap and entrains the surrounding air on each side of that exit point. But that arrow sheet of air keeps the two sides separate.
One example is mounting an air knife over the door of closed machine doing welding. Welding fumes are produced within the machine. When the door is opened to remove the finished part, the compressed air can be automatically started. The air can flow down over the door opening creating the barrier to prevent most of the fumes from exiting the machine. Yet the part can still be removed. Once the door is closed the compressed air goes off. Minimal energy is used because it only operates when the door is open.
Nex Flow manufacturers compressed air products for drying, cleaning, cooling and moving as well as offering consultation and other specialty related products to improve and optimize your compressed air systems.