Get current pricing for Sihi, LPHC 45312 Sihi Model Lphc 45312 Liquid Ring Vacuum Pump. It Is Dry Air Rated For 42 Cfm @ 28.9 Hg And 1150 Rpm. Serial # 3166905. Unit Has 1.5 Flanged In . Product Category: Process Equipment, Sub Category: Process Pumps: