Scroll vacuum pumps consist of both a set and an orbiting scroll. As the orbiting scroll movements, voids are created at the inlet of the pump, drawing in the gas. As the rotor additional moves, the gas is certainly steadily compressed until it is discharged to atmosphere at the pump exhaust.
The scroll pump design provides 100% oil-free procedure as it will not require any lubrication. The bearings are separated from the compression chamber therefore no Scroll Vacuum Pump contamination of the pumped gas can be done. Furthermore, the leak-tight design aids in preventing contamination of the pumped gas by ambient air. Maintenance is limited to changing the scroll tip seals which can 
be easily carried out by the operator and with no need for special tools.