What is an air knife?
An air knife is essentially a plenum or hollow vessel containing a narrow slot. Pressurised air fed into the vessel through one or more inlet ports is expelled through the slot as a high velocity sheet of air. Most air knives have straight slots, but circular slotted knives are also made. Practical slot widths for our low-pressure air knives range from approximately 0.5 to 3 mm (0.02" to 0.125").
Our air knives have fully adjustable slot widths, to allow them to be "tuned" to suit both the application and the blower used to supply air to the knife. Our knives are rugged and corrosion resistant. They are ideal for heavy-duty air knife applications, especially where hygiene is important. Examples of typical VABS air knives are pictured below.