The new dry compressing screw vacuum pump – VARODRY

The new VARODRY is a 100% oil-free, dry compressing screw vacuum pump. The VARODRY will initially be available in the sizes VD65 (65 m³/h) and VD100 (100 m³/h), the sizes VD160 and VD200 are already in preparation.

What qualifies the pumps of the VARODRY series is their excellent suitability for the manufacturing industry. The reason: in industrial processes, pumps do not only need to handle clean air, but also dirt, particles, out gassing of media and vapours. The pump must be able to tolerate all of this.The screw pumps are like an extruder that pushes out the disturbing particles together with the regular material at its exhaust. In addition, these pumps are able to handle vapours in the best possible way. All those advantages of the screw-pump functional principle apply to the VARODRY, but next to this, due to its integrated silencer the pump offers also a quiet and pleasant sound profile.



However, there are other factors, which make a significant contribution to improving production processes. A further process advantage is the reliability and efficiency of the pump. It can be operated continuously at any inlet pressure and is fully resistant even against repeated shock venting.

The VARODRY is 100% oil-free. Because of this there is no chance for oil migration from the gear chamber into the pumps compression chamber where this oil might react with the pumped gases or in worst case even migrate backwards to the process chamber.

This hazard cannot happen with the VARODRY, as it uses grease-lubricated bearings and as even oil-lubricated synchronization gears are not used. The VARODRY is therefore the first pump on the market which is 100% oil-free which will have a significant impact on cost reduction and process room cleanliness.

Another technical advantage for industrial use is the complete air cooling of the pump. This simplifies the integration of the pump into the plant as there is no need for the sometimes complicated water supply.

In contrast to most competitor products, the VARODRY has a moderate temperature profile. The low internal temperatures which peak around 100 to 130°C, this moderate heat is the optimum for many applications.

These properties qualify VARODRY for a number of applications:

  • Optical coatings such as spectacle lenses or decorative coatings
  • The VARODRY is also a perfect pump for drying processes and industrial cleaning systems, e.g. for casted machine parts
  • The VARODRY is also used in freeze drying application, as well in pharmaceutical as also in food-related freeze drying.
  • A dry pump with its robustness is therefore ideal in plasma applications because it can convey nearly all substances without trouble
  • Another target market which involves vacuum drying
  • In composite applications, the VARODRY pumps are very useful

With the attributes “easy”, “reliable”, “efficient” and “dry”, the VARODRY is a very good alternative to the usual pumps on the market.

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