Scroll vacuum pumps 
consist of 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 is usually steadily 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 therefore no contamination of the pumped gas can be done. In addition, the leak-tight design helps prevent contamination of the pumped gas by Scroll Vacuum Pump ambient air. Maintenance is limited to changing the scroll tip seals which can be quickly performed by the operator and without the need for special tools.