The SOGEVAC  series exist as single or double stage vacuum pumps. The Neo D series are double staged. 

Many years of experience in vacuum engineering and the latest developments in pump technology combine in the SOGEVAC range the capability to adapt to the requirements of both the industry and the environment. The comprehensive range (pumping speeds ranging from 10 to 840 m3 /h (5.9 to 494 cfm)) allows every customer to select the right pump for his particular needs.