These rebuilt Agilent Varian Turbo-V 551 Navigator turbomolecular high-vacuum pumps have an ISO-160 inlet flange, having an ultimate pressure of 1x10-8 Torr, and Agilent Varian part number 9698922. The Turbo-V 551 Navigator turbomolecular pumps have a maximize performance at minimum cost and size, with a pumping speed of 550 l/s of nitrogen (N2). We recommend a primary pump size as small as 8 CFM (e.g., Agilent Varian TriScroll 300 & IDP-15 dry scroll vacuum pumps or DS302 rotary vane vacuum pump) which can be used to operate the Turbo V 551 in all its pumping profiles. The Turbo-V 551 are compound pumps which include the MacroTorr drag stage technology to achieve the high-compression ratios for light gases and maximize the throughput of the pump. The Turbo V 551 Navigator turbo pumps with ISO inlet flange have an ultimate pressure as low as 1x10-8 Torr when used correctly, for example, the ISO inlet versions of these pumps allow the intake flange to be baked up to 80 degrees Celsius.
Torr. Offering very high foreline tolerance as high as 15 Torr yields a substantial advantage: primary pump size can be significantly reduced such that even small backing pumps as small as 4 CFM (scroll or rotary vane) can be used to operate the TV 551 Navigator in all its pumping profiles. Thanks to one of the features of the MacroTorrŽ technology you can now reduce the cost of your vacuum system and get better performance at the same time.