I am planning on buying a new pump for a Schlenk line.

I was informed that the air displacement or pumping speed is the most important parameter, and it should be at least above 120 L /min.

Does anybody have any experience with the Precision* Direct Drive Vacuum Pumps, Thermo Scientific Standard Pumps?  This has an air displacement of 300L/min and an ultimate vacuum of 1 x 10-4 torr.

 Thank you,

Tess

Univ of St. Thomas, St. Paul MN