Scroll Vacuum Pump scroll vacuum pumps consist of both a set and an orbiting scroll. As the orbiting scroll moves, 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 does not require any lubrication. The bearings are separated from the compression chamber so no contamination of the pumped gas is possible. Furthermore, the leak-tight design helps prevent contamination of the pumped gas by ambient surroundings. Maintenance is bound to changing the scroll suggestion 
seals which can be easily carried out by the operator and with no need for special tools.