B160R11 | Dilo Company, IncSF 6 gas service unit Operating voltage 220 - 240 V/50 - 60 Hz. B160R11S15: SF 6 gas service unit Operating voltage 100 - 127 V/50 - 60 Hz. The compact service unit has been specially designed for very small SF 6 gas quantities and is perfectly suited for applications such as SF 6 gas handling on medical devices, electron microscopes or in.