SIHI Liquid Ring High Performance Vacuum Pump. Model: LOHB 2704 BN 001 01 2. Capacity: 27 in. Hg @ 25 cfm (using dry air). Westinghouse Motor, 3 hp. SIHI pumps offer higher vacuum, operational safety, entrained liquid handling, and low vibration and noise levels. The vacuum pumps have one moving part, the impeller and shaft assembly, and no internal metal-to-metal contact. Typical application areas: Chemical, petro-chemical and pharmaceutical, Plastics, Wood/Timber processing, Food, dairy and beverage, Medical, Energy Production, Mining, Water treatment. Overall dimensions: 3 ft. L x 1 ft. 3 in. W x 2 ft. 11-1/2 in. H.(ACN27).