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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
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I am not that familiar with those pumps. I have used Fischer Maxima C pumps in the past that were 2.6 cubic ft/min that run around $1700. I currently have an edwards RV5 pump that is 3.7 cubic ft/min and are slightly more expensive. They seem to have always worked just fine and I have never had any issues. I know that recomendations are 120 L/min but both the Fisher and Edwards pumps have always serviced us just fine.
Nick
Nicholas Kingsley Assistant Professor of Chemistry University of Michigan-Flint (810) 762-3077
Well I'm not having that much knowledge about the pumps..But ya it's true that some parameters like pressure,tempareture and spped Are the common factors which should be keep in mind while choosing an appropriate pump....I have heard a lot about Fischer Maxima C pumps and those are really good one..So i suggest you to try that pump..
After working with Schlenk/vacuum lines equiped with both Edwards RV8's and RV5's, I have to say that I notice a difference. If you want a good High Vacuum line, I would go with a stronger pump (like an RV8 compared to an RV5). If you have a Schlenk line and won't be doing a lot of extremely sensitive work, or pumping off a lot of solvents, you might be ok with the cheaper, less strong versions.