This pump has special structure to keep from the lubricating oil go into container Specifications 1,2X Series Two-stage Rotary Vacuum Pump2, ... 0*0.01Pa4,Power:0.37-5.5KWDetails :2X Series Two-stage Rotary Vacuum Pump1,Technical Parameter:Speed of exhaust:2-70L ... :The main parts of the vacuum pump by vacuum pump body , rotor, rotary piece, end cover and spring etc .2X series vacuum pumps take a double ...