New drive for vacuum blowers with hermetically sealed motor for the high vacuum range from 200 to 10-5 mbar
From the start of 2017, for driving the AERZEN vacuum blowers a new drive motor is used. In future, only one motor design (HM) will be available for neutral and aggressive gases. This synergy effect reduces the variant diversity of vacuum blowers to only one motor drive with hermetically sealed drive.
The AERZEN vacuum blowers (previously called canned motor blowers) suitable for permanent operation and with hermetic drive make particularly short pumping times possible and are used in industrial high vacuum technology for a vacuum range of 200 bis 10-5 mbar together with one or two backing pumps.
These blowers work with a fully hermetic drive. The drive shaft is sealed by an integrated motor without connecting passage to atmosphere. Due to the almost doubling of the speed for smaller sizes, very short pumping cycles result compared with vacuum blowers with a speed of 50 Hz, which leads to a considerable acceleration of the production processes for the operator. Even if, for increasing the performance further, two backing pumps and one vacuum blower are integrated into a pumping set, the entire unit still distinguishes itself by a particular compact design - a special advantage concerning multi-systems with numerous pumping sets.
Vacuum blowers made by AERZEN are available in type of construction HM for neutral gases in 9 sizes for theoretical nominal intake volume flows from 406 to 15,570 m³/h. These systems are used for the generation of industrial vacuum, for example in chemical and process engineering, in foil and glass coating, evacuation of hydrogen, in helium leak detection systems. In addition, these blowers are working in the semiconductor industry, in microelectronics, in the manufacture of flat screens, in laser technology and in solar technology. The blowers can convey in both directions - vertical and horizontal. Due to the standard water cooling they are appropriate for application under clean room conditions. An excellent mechanical resistance (up to 150 mbar) reduces the pumping times. Moreover, the application of a frequency converter makes a high control range (1:5) possible, and therefore, the use of smaller blower sizes. Thanks to different motor variants for cyclical and continuous operations, an individual solution can always be found, even for special applications.