Get current pricing for Sihi, SIHI 77 CFM Vacuum P Sihi Model Lphb-3408 Single Stage Liquid Ring Vacuum Pump Rated 70 Cfm @ 24 Hg. To 77 Cfm @ 20 Hg @ 1750 Rpm, Unit Direct Connected To 5 Hp, 3/ . Product Category: Process Equipment, Sub Category: Process Pumps: