1.17 Turbomolecular pumps with corrosion-resistant oil for the lubrication and cooling of the rotor bearings

Perfluoropolyether fluids for vacuum technologies

“…High-speed turbomolecular pumps ran for a long time with Y-VAC 06/6 or 18/8 forced lubrication: in particular, VAC 06/6 has been tested up to 15000 h and several cases of operating periods longer than 25 000 h have been reported in the nuclear field without problems on bearings (Henning and Lotz, 1977). Roots pumps can run very satisfactory with Fomblin carrying aggressive gases (HF, UF6, C1F3).…”

“…vacuum technicians(Conru and Laberge, 1975;Dennis et al, 1978;Henning and Lotz, 1977; Holland et al 1972a,b; Laurenson, 1977; Laurenson and Caporiccio, 1977; Luches and Perrone 1976;Tsai et al, 1979).…”

Purification and properties of d-ribulokinase and d-xylulokinase from Klebsiella aerogenes

“…Field-desorption mass spectra of the purified pentitol phosphates were obtained by Dr. Anne Dell (Imperial College) with a dual field-desorption/ electron-impact source on a KRATOS MS50 mass spectrometer. The spectra were counted by comparison with the electron-impact spectrum of Fombln (Henning & Lotz, 1977). Desorption of the pentitol phosphates occurred at a wire current of 20-23 mA.…”