Busch Samos SB regenerative blowers are designed for either pressure or vacuum. They are available in single and two stage models so they can operate over a wide range of flow and differential pressure. Samos low maintenance features include: rugged die cast aluminum construction, sealed-for-life bearings, fan cooled motor and non-contacting impeller. Six sizes are available in single and two stages from 59 to 777 ACFM pumping speed.