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VarioJet® nozzles

Lechler VarioJet® nozzles belong to the internally mixing two-fluid nozzles. The water is fed axially via a bore hole and split over a cone in a thin liquid film. In the mixing chamber this thin film of liquid is atomized of the atomizing air in fine droplets. Subsequently, the resultant gas-liquid mixture is atomized a second time as it exits via several of circularly arranged bore holes.

The new nozzle design of the VarioJet II series creates a spray jet with a wide spray angle, which is characterized by both a uniform liquid distribution and a fine droplet spectrum combined with low specific air consumption. The large free cross-sections in the nozzle minimize the risk of clogging and reduce maintenance. Through the flow-optimized nozzle housing the resistance of the nozzle against caking in the area between the individual sprays is increased. In addition, the outer dimensions of the nozzles could be greatly reduced with retaining the same performance. Therefore cost savings in the construction of the nozzle lance are possible. By identical outer dimensions of sizes, it is now also possible to share among the nozzles with various performance ratings.

The fineness of the droplet spectrum depends highly on the air/liquid ratio and the pressure level of the two flow rates. In general, the higher the air/liquid ratio and the higher the pressure level of atomizing air and fluid, the finer the droplet spectrum.

 

Injection volume of the new VarioJet II-6 series:

  • 120.72X.WW.AS.00.0 2-40 l/min (available with 60° or 90° spray angle)
  • 120.83X.WW.AS.00.0 2-60 l/min (available with mit 60° or 90° spray angle)
  • 120.85X.WW.AS.00.0 4-84 l/min (available with 60° or 90° spray angle)
  • 120.924.WW.AS.00.0 3-110 l/min (available with 60° spary angle)

 

Injection volume of the new VarioJet II-8 series:

  • 120.954.WW.AW.00.0 7-150 l/min (available with 60° spary angle)

 

Characteristics of the new VarioJet II series:

  • Large spray angle (60°, 90°, others on request) for a good coverage of the cross-section of the channel
  • Economic atomization by use of a film-forming preatomization
  • Large control ratio > 20:1 (measured in laboratory conditions)
  • Typical pressure range: liquid 1-9 bar,g; atomizing air 1-6 bar,g
  • Adaptation of the droplet spectrum by changing the air / liquid ratio
  • Minimized risk of clogging by large free cross-sections without internals

 

Application examples:

Gas cooling in medium- sized and large gas cooling towers and gas-bearing pipes (ducts) e.g. in the cement, lime, glass and iron & steel industry, as well as in power plants.

VarioJet® (old) New VarioJet® II series