Leybold LVO 420 Leybonol PFPE Chemical Inert Vacuum Pump OilL is used in SOGEVAC BI series pumps with 1 phase motors, models SV 40 BI and smaller. It is for use in chemical processes which require inert mechanical vacuum pump oil fluids. Applications include pumping strong oxidants like oxygen, ozone or nitropus oxides, as well as reactive substances like halogens, hydrogen halides and (conditionally) Lewis acids.