Arizona Vortex Air Curtains give you more performance at a lower cost than competitors. Vortex Air Curtains will replace old fashioned blow off devices and reduce the amount of compressed air you use. Air Curtains are used for large area blow off and cleaning of flat surfaces. Air Curtains are ideal for BIG jobs, where you have to move a lot of chips, dirt, water or oil, or need to cool a product with just a fraction of the compressed air you currently use. Compressed Air Usage: 4.1 SCFM per inch of length at 80 PSI (operates at any pressure to 20 PSI) Air Curtains entrain the surrounding air: Amplification ratios of 40:1 Shim Set: .002â (.05mm) Regulate: The pressure regulator on the compressed air supply gives control over the flow, force, and air consumption. Noise level: 70 dBA (for most applications) Advantages over Blowers: Uniform curtain of air (Smooth Flow), No Turbulence. Various Lengths: 3", 6", 8", 12", 18", 24", 30", 36" aluminum or stainless steel.