Turbomolecular Vacuum Pump with Controller. The Turbo-V 551 Navigator turbomolecular vacuum pump with MacroTorr drag technology delivers high compression ratios, high throughput, and high discharge pressures for a wide-range of high vacuum applications. The unique bearing and permanent dry lubrication eliminate oil and maintenance, and permit operation of the pump in any orientation. 4-inch ISO flange. Pumping Speed: 350 l/s. 220V, 50/60 Hz, CE. Date: 2013.