at
http://www.edwards.boc.com/ (http://www.edwards.boc.com/)
Look under products, rotary vane pumps
You will find specs for those pumps.
The e2-m2 isnt there anymore but the e2-m1.5 is so I guess it would be around that
I wish I could tell you its a good pump but I dont know since the one I have sometimes stops for no reason, so I cant really use it. Id have to get it repaired, but the fact that I have another one and that I dont like to answer questions for technicians who, for some reason here, always want to meet with you, makes me change my mind
There's some good information on repairing vacuum pumps on the web page linked to in Post 420877 (https://www.thevespiary.org/talk/index.php?topic=6118.msg42087700#msg42087700)
(lugh: "Vacuum Pumps", Chemicals & Equipment) and some very good advice from a long time hive bee that has worked for SWIL more than once in Post 245579 (missing)
(lugh: "Re: Welch Duosel Vacuum", Chemistry Discourse) :)