Scroll vacuum pumps contain both 
a fixed and an orbiting scroll. As the orbiting scroll techniques, voids are manufactured at the inlet of the pump, drawing in the gas. As the rotor additional moves, the gas can be steadily Scroll Vacuum Pump compressed until it is discharged to atmosphere at the pump exhaust.
The scroll pump design provides 100% oil-free operation as it does not require any lubrication. The bearings are separated from the compression chamber so no contamination of the pumped gas is possible. In addition, the leak-tight design aids in preventing contamination of the pumped gas by ambient air. Maintenance is bound to changing the scroll tip seals which may be easily carried out by the operator and without the need for special tools.
