Precision cleaning with compressed air / blown air –
Intermediate / blow-off box

Not only a hot wind for your processes, but precise and efficient parts cleaning!

New! R-TECH, for parts cleaning without compressed air!

Cleaning using blast air!

In terms of environmentally friendly, low-energy, flexible production of workpieces, it is also important to rethink the peripheral processes associated with the cleaning procedures. We have completely reworked our tried-and-tested technology for simple intermediate cleaning processes in dry cleaning – and come up with SEMA R-TECH. A simple, low-maintenance cleaning system. Automatically aligning to the workpiece contour. Maximum blast force with minimum throughput. Laminar flows up to the last moment and a special opening which increases the flow velocity to a maximum – without any venturi attachments, etc. Once again, we are able to demonstrate our passion for innovative systems with SEMA R-TECH:
SEMA R-TECH, a highly efficient system for demanding processes in intermediate cleaning.

The C-SYS I Cleaning Systems (formerly KNOTH Automation GmbH) SurfaceAircleaner and PrecisionAircleaner cleaning systems were the forerunners amongst the industrial parts cleaning systems with regard to two-dimensional as well as precise cleaning tasks with compressed air as the medium. Up to then, the area of intermediate cleaning had been a neglected topic: Manual workplaces with compressed air pistols were preferably used, larger production lines were equipped with inefficient, high-maintenance blast air systems, to be able to ensure at least surface cleanliness. By now, our intermediate cleaning systems and precision cleaning systems are part of the usual inventory at almost all larger automotive production lines.

No mixing of media, only air!

Highly precise, selective cleaning!

Small space requirement!

Short cleaning time!

The common name for our SurfaceAircleaner and PrecisionAircleaner cleaning systems worldwide is C-SYS I Cleaning Systems “blow-off box”. This is proof for the worldwide brand awareness and function of our systems.

While our SurfaceAircleaner cleaning systems are used for the general cleaning of workpiece contours and indentations (for example simple intermediate cleaning or pre-cleaning before final washers), our PrecisionAircleaner cleaning systems target defined cleaning tasks, which must ensure process reliability for subsequent work steps WITHOUT further work steps.

In both cases, the installed cleaning units in the “blow-off boxes” consist of nozzle assemblies directly adapted to the workpiece. This means there is no mere creation of wind and superficial blow-drying of the workpiece. The nozzles are individually aimed at areas to be cleaned, based on a patented process, to maximally utilise the flow of the compressed air. The movements of these nozzle assemblies are planned dependent on the environmental parameters (cycle time, size, process), and implemented in the system exactly defined.

More than 200 different types of nozzles are available to us for this cleaning process – however, this portfolio continues to be further developed and complemented by new products within the scope of energy efficiency: Rotary nozzles with various bearing, drive and retrieval systems are – if permitted by the workpiece contour – also used.

Our “blow-off boxes” (SurfaceAircleaner and PrecisionAircleaner) replace industrial parts washers for intermediate wash processes in many production lines. Process reliability after previous parts cleaning with our systems can even be guaranteed for example for subsequent screw connection or press-in operations.

Furthermore, no flushing cycle is required! This means connection to a washing water source or treatment station can be abandoned in most cases! As a consequence, there will be no unnecessary costs associated with treatment and/or disposal of the medium.

All systems are individually adapted to the workpiece types of our customers by taking energy efficiency into consideration, to be able to get most of the energy of the compressed air to the workpieces. Furthermore, all cleaning units are divided into several groups, to be able to clean every part of the workpiece individually with the actually required cleaning time and pressures (0.5-2 bar). It goes without saying that these properties, combined with energy-saving cleaning nozzles, create maximum effectiveness. Moreover, all our Aircleaner models are designed for operation with 3 bar networks.

Depending on the given cycle time, our Aircleaner cleaning systems have a connection value of for example 12 kW (comparison: crankcase, coolant, cycle time 60 seconds, cleaning time 40 seconds). Proportionally controlled, in this example this results in a consumption of approx. 9 kWh. This means as little as 0.15 kWh per workpiece.

If there is not sufficient space, of course our SurfaceAircleaner and PrecisionAircleaner cleaning systems can also be supplied via the compressed air networks of our customer. More information on this can be found under “Energy savings package”.

Energy efficiency through stand-alone supply


For every blow-off box, C-SYS I Cleaning Systems provides own air supply – also for retrofitting!

20% saving
Precisely dimensioned compressors provide sufficient air with lowest connection values. A component cleaning system with connection to a central compressed air network compared 1:1 with a connection to a direct supply results in a saving of more than 20%!!

30% saving
This effect can be increased even more with the use of special energy saving valves, bringing savings to more than 30%!

Even more savings
The use of the latest nozzle assemblies and component cleaning procedures – which can be retrofitted for almost any systems from KNOTH – brings further savings potential!

Supplying processing machines
The processing machines connected upstream or downstream can also be supplied by the compressor system from C-SYS I Cleaning Systems, enabling line operation independent of the hall’s air network!

The SurfaceAircleaner and PrecisionAircleaner cleaning systems provide the following benefits:

  • Cleaning of complex structures
  • Cleaning of areas that are hard to reach (e.g. water spaces in cylinder heads)
  • Up to 98% removal of contaminations without additional workpiece flushing units (weight proportions)
  • No workpiece heating
  • No mixing of media
  • No compressed air consumption outside of cleaning cycles
  • External movement units
  • Simplest maintenance
  • Nozzles for process-relevant workpiece areas are fixed for quick replacement in case of damage
  • Nozzles for general areas are secured against maladjustments with patented ball joints
  • Automatic processing chamber cleaning
  • Design as inline concept, as gantry-loaded system or as special designs with several loading and unloading options
  • Precise workpiece preparation for subsequent processes

C-SYS I Cleaning Systems offers the following additional options:

  • Stand-alone control unit, incl. CPU and display
  • Energy efficiency package
  • Stand-alone supply via compressed air station
  • Return pumping station
  • Stand-alone extraction units
  • Different separating devices

Typical workpieces / applications for precision cleaning with compressed air:

Automotive (truck / passenger car)

  • Motor: Crankcase, cylinder head, crankshaft, camshaft, connecting rod, balance shaft, turbocharger, pump housing, valve housing etc.  
  • Gear unit: Clutch housing, gear case, countershaft, drive shaft, gear shaft, gear wheels, shifting fork, shift lever, CV transmission shafts etc.
  • Steering: Steering rack, steering gearbox etc.
  • Drive: Drive shaft, calliper, cardan shaft, quick-release axle, thrust tube etc.
  • Chassis: Steering knuckles, half-axis, U-joint crosses, wheel carriers, servo pump, pin fork, track rod end etc.
  • Body: Chassis parts, special section tubes, air conditioning compressor elements etc.
  • E-mobility: Rotor, stator, motor housing, electric motor transmission, battery compartments, battery frame, electrical connection elements, battery cell, fuel cell, electronic components, e.g circuit boards, etc.

Machining tools / measuring equipment

  • Cleaning of measuring equipment
  • Injection tools
  • Extruder tools
  • Workpiece holders
  • Workpiece clamping adapter

White goods / household goods

  • Aluminium housing, pump elements, compressor elements, compression elements etc.

Non-metallic workpieces

  • Plastic, ceramic, glass fibre, carbon etc.

Large-scale production parts & precision parts

  • Hydraulic components, valve blocks etc.
  • Screws etc.


  • Packaging