Elmo Rietschle oil-lubricated rotary vane vacuum pump with 40 HP, 575v, 60 Hz, 3-phase TEFC motor. Standard features include special alloy vanes, non-return valve, gas ballast valve, easy access exhaust oil separator with replaceable elements, back pressure gauge, sound attenuating cover, and initial fill of oil. An inlet filter is highly recommended and sold separately.