What is an air knife? An air knife is a hollow metal bar with a narrow slot along its length that produces a thin, uniform, powerful sheet of air – like a blade – to dry water and blow off dust, chips and oil from products on a conveyor. It is fed by a high-pressure blower or compressed air.
Quick facts
| Parameter | Value |
|---|---|
| Construction | Aluminium or stainless body, plenum, 0.1 – 2 mm slot |
| Air source | Blower (energy-efficient) or compressed air |
| Length | To product width (6″ – 36″ and longer) |
| Applications | Drying bottles, cans, parts; dust removal; air curtains |
How an air knife works
Air enters the plenum and exits the slot as a flat sheet. Knives are typically angled 30 – 45° against conveyor travel to strip water and dust.
Blower or compressed air?
Blower air knives use 50 – 75 % less energy than compressed-air knives; compressed-air knives are compact for tight spaces. See the air knife drying system.
Applications
- Drying bottles and cans before labelling and coding.
- Blowing water, oil and chips off parts after washing.
- Cleaning dust from conveyors, film and packaging.
Reference standards
| Standard | Scope |
|---|---|
| (EU) 2023/1230 | Machinery Regulation |
| 2003/10/EC | Workplace noise: 80 / 85 / 87 dB(A) |
| (EU) 327/2011 | Fan efficiency |
Related products
Contact ISE
EQUIPMENT INDUSTRIAL SOLUTION CO., LTD (ISE) – Ho Chi Minh City, Vietnam.
Contact us: Sales +84 909 617 185 – Technical +84 979 117 185 – Email: [email protected]
