Airablo oil vane vacuum Max flow rate is 70 cfm, can get up to 24 in Hg Unit flow rates (tested with rotameter) In hg:scfm 1 :70 3 :64 6 :60 10: 52 13 :44 15 :40 18 :32 21.5: 22 23 :16 24 :12 25 :0