Leybold, pioneer of vacuum technology, has launched the new VARODRY, a 100% oil-free, dry compressing screw vacuum pump.

Screw pumps are currently state-of-the-art in the field of industrial vacuum pumps. The VARODRY will initially be available in the sizes VD65 (65m³/h) and VD100 (100m³/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, outgassing of media and vapours.

The variable inlet flange arrangement also enables a flexible installation of the pump within the plant. Furthermore, the silencer facilitates the pushing-out of liquids or condensed vapours, which might incur in some industrial processes. This prevents potential formation of rust and contributes significantly to process reliability.

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. Any number of cycles can be run without overload, which is still not the current market standard. 

A major differentiation of the VARODRY is its complete oil-freeness. 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.

The VARODRY is therefore the first pump on the market which is100% 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 (depending on operation point) also allow a handling of temperature sensitive media, often preventing that those react immediately and build-up layers inside the pump.

Source: Leybold