Elmo Rietschle once through oil lubricated rotary vane vacuum pump with 5 HP, 230/460v, 60 Hz, 3-phase TEFC motor. This single-stage, air-cooled pump is ideal for handling a wide range of gases, including those which are extremely wet or aggressive. It features low operating temperatures, a fresh oil reservoir, low oil level shut-down switch, oil metering pump, and shaft seals to protect the bearings from contamination. An inlet filter is recommended and sold separately.