Hoffman Centrifugal Blower/Exhauster. Model: 75102A. S/N: 1187024. Maximum pressure rating of casing: 25 psig. Number of stages: 7. Impeller diameter: 25 in. Approximate blower performance @ 4075 cfm inlet airflow (discharge pressure): 12.5 psig. Approximate exhauster performance @ 4075 cfm inlet airflow (vacuum): 13.75 in. Hg. Toshiba Motor, 75 hp, 3540 rpm, 230/460 V, 178/89 amps, 60 Hz, 3 phase. With its unsurpassed durability and efficient operation, Hoffman blowers/exhausters are the preferred choice for aeration, combustion, and vacuum service, etc. Sample applications: aquaculture, cement and lime, chemical, coal bed/landfill, electronics, oil and gas, power generations, process gas, pulp and paper, refining, resin and plastic, soil remediation, and wastewater.