(2) SIHI Liquid Ring Vacuum Pumps. Model: LPH 3708. Board No. 001 01 2. Pump capacity: 5 gpm (each), System capacity: 15 gpm. (3) Siemens motor, 10 hp, 1750 rpm, 230/460 V, 25/12.5 amps, 60 Hz, 3 phase. Rated at 75 CFM for 22.5 vacuum inches Hg, (absolute pressure 7.42 in. Hg / 188 mmHg.) The LPH 3708 liquid ring vacuum pumps are reliable pumps that can be used in a variety of applications; their two stage configuration optimizes performance. The vacuum pumps only moving part is the impeller and shaft assembly. These pumps have no internal metal to metal contacts. Pump inlets/outlets: 1-1/2 in. diameter suction/discharge ports, flange: 5 in. diameter with (4) thru-holes, center-to-center distance: 4 in. L. Overall dimensions: 4 ft. 10 in. L x 3 ft. 10 in. W x 3 ft. 3 in. H.