RAETTS Products

Experts for air suspension and magnetic levitation technologies.

RAETTS Stainless Steel air knife

RAETTS is one of the world’s leading manufacturers of air knife drying systems. We specialize in the research and development, production and sales of air knives for drying and dedusting, adapt to the drying methods of different production lines, and can adapt the air knives and drying systems to the air knives in operation. to different customer needs.

Product Details

The advantages of RAETTS stainless steel air knife are including high precision, stronger hardness, higher pressure resistance and higher temperature resistance. It is produced by German manufacturing technology and production equipment, very suitable for various airflow drying systems and air knife drying systems. The stainless steel air blade is widely used in ultrasonic cleaning, glass cleaning machine, circuit board, electroplating parts, coating film, coating, non-ferrous metal plate/wire sheet production and other industrial processes,for removing water and drying.This Stainless Steel air knife system can also be used for barrier-free isolation of harmful gases,dust, cold/hot air;blown paper on printing and post-press drying; extremely rapid heating, thawing and high-temperature sterilization of food and medicine.

Application industry

Air knives create a powerful air curtain that can be used in a variety of blow-off and air-cooling applications such as:

  1. Automobile industry: used for blowing off extra water, coolant, dust, debris, etc. in manufacturing, as well as blowing cooling, drying, and dust removal of steel plates before painting.
  2. Electronics industry: drying the Electronic circuit boards quickly before assembly.
  3. Beverage canning and bottle making: Before labeling, inkjeting or packaging of beverage bottles, blow off the water and attachments on the bottle mouth or body.
  4. Chemical industry: Blow off surface chemicals or moisture before labeling or packaging.
  5. Food and medicine: Before producing or packaging, blow off moisture and attachments, or remove dust from openings and bags before bagging.
  6. Metal industry: Blow off coolant or other liquids from metal surfaces; dry or cool the surface before polishing, electroplating, and painting processes.
  7. Rubber and plastic industry: blowing off dust or debris on the surface of the product;drying before extruding; cooling after injection molding.
  8. Printing (inkjet): blow off dust, debris, and water vapor before printing and inkjeting, or use it to quickly dry the ink.


1.This Air Knife Drying System adopts all stainless steel SUS304 or medical grade 316 sanitary stainless steel, which has stronger hardness and higher endurance.

2.The structure of this stainless steel standard air blade adopts a unique design to ensure that the wind resistance is small, the wind speed is uniform, and the accuracy can reach ±5%.

3.The width of the air outlet is adjustable and the range is 0.3~3mm.

4.The length of the air knife can be customized according to customer requirements and the length can be up to 6m.

5.Various air inlet diameters and positions can be selected to meet the requirements of screw connection or hose connection. It is easy to be installed.

6.This air knife drying system can withstand the highest wind speed of 400m/s. The maximum temperature resistance is 250 ℃, and the maximum pressure resistance is 5kgf/cm2.

7.It can be matched with RAETTS high-speed centrifugal blower and RAETTS high-pressure blowers.The application of this Stainless Steel air knife is flexible and convenient.

Technique data sheet:

Model:                   RTSUS-108                                          Suitable air source:  RAETTS High Speed Centrifugal blower

Air knife outlet:  Adjustable (minimum 0.1mm)                                Air inlet size:             108

Air knife Length:can be customized                                               Pressure resistance:  5 kgf/cm2

Speed:highest can be up to 400m/s                                      Temperature resistance:250℃

Material:stainless steel                                                   Performance:  Acid and alkali resistance

Selection instructions and installation dimension drawing:

Model A B C D E F G H
RTSUS-32/38-C-H 32/38 104 100-2400 M8*50 50 25 49 0.3-5
RTSUS-45/51-C-H 45/51 120 100-2400 M8*50 60 28 63 0.3-5
RTSUS-60/63-C-H 57/63 142 100-2400 M8*50 77 38 82 0.5-5
RTSUS-76-C-H 76 155 100-2400 M8*50 89 45 86 0.5-5
RTSUS-89-C-H 89 188 100-2400 M10*50 77 50 81 1-5

Instructions for selection:

  1. For Example: model: RTSUS-76-C-H-R1, If you want to order air knife size 500mm, the blade width 0.8mm, and the side air inlet size 76mm. The correct order model you should choose is: RTSUS-76-500-0.8-S1.
  2. The air inlet selection codes are: R, S, T. (R2: represents the air intake from both ends of the air knife; S represents the air intake from the side of the air knife, if you need multiple air inlets on the side, it will be S2, S3, etc.; T represents the air intake from the top of the air knife, if you need multiple air intakes on the top,then it will be T1, T2 etc.,)
  3. Please pay attention to the effective length C of the air knife when ordering, this length does not include the thickness of the end covers on both sides of the air knife. The length of the air knife ordered in the above case is 500mm, excluding the side end covers. The actual length of the installation size is 510mm.
  4. Please contact us for consultation when ordering if your size is beyond the above data range.


※ Be careful not to collide with the knife edge, and the medium should not contain too thick impurity particles, so as not to block or damage the knife edge.

※ The width of the knife has been calibrated according to the customized requirements before delivery. If it is necessary to change the width, please send it back to our factory or ask professional staff for adjustment, so as to avoid weakening the performance of the air knife system due to incorrect adjustment.


RAETTS provides high efficiency and energy-saving system solutions for our global customers,contributing to achieve the goal of carbon peaking and carbon neutrality.

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Asia HQ

RAETTS High-Tech Park No.3,Juyuan Second Road.Dongguan City,Guangdong Province, China

Europe HQ

NeumarktstraBe 17,32052, Herford, Germany(R&D,Production&Sales)


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