Scroll vacuum pumps contain both a set and an orbiting scroll. As the orbiting scroll techniques, voids are created at the inlet of the pump, drawing in the gas. As the rotor further moves, the gas is usually steadily compressed until it is discharged to Scroll Vacuum Pump atmosphere at the pump exhaust.
The scroll pump design provides 100% oil-free operation as it will not require any lubrication. The bearings are separated from the compression chamber so no contamination of the pumped gas can be done. In addition, 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 very easily done by the operator and with no need for special tools.