What is an Air knife?
Air Knife system is one of the most economical and cost-effective way to deliver a hard-hitting sheet of air over short or long distances. Compressed air is the only requirement for operation. There are no moving parts, electricity, or costly downtime. Air knives utilize the coanda effect (entrainment of surrounding air) to amplify the air upwards of 40 times, making them very efficient. Air knife systems utilize compressed air in many industrial applications such as drying, cleaning, wiping, cooling, and blow off.
How does an Air Knife work?
The Supreme Air Products Air Knife Systems feature multiple ¼-20 mounting holes at the rear face for quick and easy installation. We also offer an optional air knife mount on a magnetic base which is equipped with an on/off switch. All Air Knife Systems come pre-installed with a 0.002” shim which is optimal for most applications, however additional shims can be installed for heavy duty wiping, cooling and drying as needed. Our Air Knife Systems are stocked in a variety of sizes. For custom sizes, multiple air knives can be joined together end-to-end and secured with an optional bracket. Since our air knife systems are full flow, joining 2 or more air knives together will produce one continuous air stream without interruption.
What Type of Air Knife do we carry?
The Supreme Air Products Air Knife Systems are offered in two models – regular and supreme. The Regular Air Knife is cost efficient and provides a 30:1 air amplification ratio with air consumption of 3.4 CFM per inch at 80 PSI. The Supreme Air Knife provides the most efficient performance with a 40:1 air amplification ratio and lower air consumption of 2.9 CFM per inch at the same pressure. The Supreme Air Knife also produces lower noise levels, making it the top choice among our clients.
|Supreme Air Knife||Regular Air Knife|
|Air consumption @80 PSIG||~2.9 SCFM per inch||~3.4 SCFM per inch|
|Air amplification ratio||40:1||30:1|
|Material||Aluminum & Stainless Steel||Aluminum & Stainless Steel|
|Available Sizes||2″ (51mm) up to 54″ (1372 mm)||3″ (76mm) up to 54″ (1372 mm)|
|Custom size available||Yes||Yes|
|Temperature Rating||400°F (204°C)||275°F (135°C)|
How does an Air Knife System Work?
- Compressed air enters the air chamber through a ¼” NPT inlet located at the back or end ports of the air knife.
- Surrounding air is entrained into the primary air stream due to the coanda effect. This produces an air amplification ratio of 40:1 in the supreme air knife and 30:1 in the regular air knife.
- The air stream now exits the air knife system. In the supreme air knife, the air flows straight outward, whereas in the regular air knife, the air travels downward at a 90° angle along the front face of the air knife. In both cases, the amplified air stream resembles a hard-hitting curtain of air which reduces energy consumption in blow-off and cooling applications due to the air amplification effect.
Regular and supreme air knife systems are available in aluminum or stainless-steel construction and provide quality laminar flow. While our competitors opt for plastic shims and metal screws, Supreme Air Products Corp. takes pride in the quality of its products and uses only stainless-steel shims and screws to ensure durability and longevity.