You have three mounting options:
1. EXAIR manufactures the Universal Air Knife Mounting System which can be used for all styles of Air Knife and Ion Air Knives. 

2. Use existing mounting holes/cap bolts
     a. The Super Air Knife also has ¼-20 tapped holes on 2” centers along the length of the knife which can be used for mounting.
     b. With the standard air knife you may choose to replace the existing bolts and provide longer bolts for mounting.
     c. The Full-Flow Air Knife has 10-24 tapped holes on 1-1/2” centers along the length of the knife which can be used for mounting.

3. You can hard plumb the air lines and use the air line to support the air knives.