Scroll vacuum pumps contain both a set and an orbiting 
scroll. As the orbiting scroll movements, voids are manufactured at the inlet of the pump, drawing in the gas. As the rotor further moves, the gas is definitely steadily compressed until it is discharged to 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 therefore no contamination of the pumped gas is possible. Furthermore, the leak-tight design aids in preventing contamination of the pumped gas by ambient air. Maintenance is limited to changing the scroll suggestion seals which may be very Scroll Vacuum Pump easily carried out by the operator and with no need for special tools.