Air Knife AK GK


The Air Knife

The Air Knife belongs to the group of air gates. As the name already indicates, these are ionizers which are supported by air flows. The effectiveness of the Air Knife can be explained by the special design of the air discharge nozzle which creates the so-called “coanda effect”.

The Coanda Effect

In contrast to full jet nozzles, with the “coanda effect” the ionized air comes out of a slotted nozzle producing a flat jet. The special construction of the bottom-side of the Air Knife causes an unilateral reduction in injection (air suction from the atmosphere), thus creating negative pressure so that the ionized air is directed to the material web.

Special features and advantages

Reducing the injection affords the air blast operated Air Knife ionization unit two particularly positive aspects:

  • The air discharge speed is increased, resulting in increased effective depth. This in turn permits a greater operating distance of the Air Knife to the material web.
  • The slot jet has a wider angle of dispersion, which is expanded from 24° to 33°. A larger surface is therefore covered with ionizing, neutralizing air.


  • Plastic processing industry: Film processing, packaging machines, sheet extruders, etc.
  • Textile industry: Weaving and spinning mills, textile finishing, etc.
  • Graphic industry: Screen and pad printing machines, photo and film processing machines, folding machines, etc.
  • Paint shops: Car painting, painting of plastic components, etc.

Possible configurations of the Air Knife

Air Knife + Multistat Power pack (for all-electronic production monitoring)
+ EI VS Ionizing bar (especially for high-speed machines)


Air Knife + EN 8 Power pack (Standard)
+ EI RN Ionizing bar (Standard)

Technical data

Types AK GK
Basic unit for one
ionizing bar
without ionizing bar.
Order-No.: 04.0000.000
Please order ionizing bar separately.
Dimensions 72 x 35 mm
Length 120 mm – 300 mm
Special lengths on request for special lengths radial air connection.
Nozzle Slotted nozzle
Operating temperature +5 °C to +50 °C
Storage/transport temperature -15 °C to +60 °C
Optimum effective distance 20 – 30 mm
Smallest bending radius (cable) R 50

Subject to technical changes!


Air hose,
up to 500 mm total length AK GK
Order-No.: X-6616
Air hose,
from 501 mm total length AK GK
Order-No.: X-6617

Suitable Power packs

Connectable lengths
(ionizing unit incl.
high-voltage cable)
EN SL max. 5 m
EN SL LC / EN SL RLC /ENC-2/ENC-4 max. 10 m
EN 8 / EN 8 LC max. 18 m
Multistat max. 18 m
EN 70 / EN 70 LC max. 2 x 18 m