In 1905 the principle of the scroll compressor was developed by the Frenchman Leon Creux. The scroll pump is now being used as an oil-free vacuum pump. Every scroll pump consists of two Archimedes spirals engaging each other with an offset of 180°. Thus several crescent-shaped pockets of differing sizes are created. By means of an eccentric drive, a second spiral is made to orbit about a fixed spiral, thus reducing the volume of the pockets and compressing gases from the outside towards the inside thereby pumping the gases.
Important to the quality of a scroll pump is that precise manufacturing tolerances are maintained and that suitable materials are selected. The Scrollvac has multilpe models, with the range offering both single phase and three phase models.
Advantages to the User
- - Maintenance-poor, free of oil and bearing lubrication, free of hydrocarbons
- - Absolutely oil-free
- - High effective pumping speed
- - Low ultimate pressure
- - Low noise level
- - Low vibration operation
- - Atmospheric inlet pressure allowable
- - Low weight
- - Air cooling
- - Low power consumption
- - Electron beam welding
- - Lasers
- - Leak detection systems
- - Accelerators / synchrontrons
- - Surface analysis instruments
- - Scanning electron microscopes
- - Load lock
- - Spectroscopy
- - Lamp manufacturing
- - As a backing pump for turbomolecular pump systems
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