Ranging from 150 to 2000 m3/hr, these Roots pumps are suitable for a wide range of applications. Coupled with primary vane pumps or dry pumps, they achieve low pressures with high pumping speed. Standard models feature air-cooling, canned motors, and low noise levels. RSV "B" models have a by-pass valve and manifold integrated into the Roots stator. This feature allows extended operation at high inlet pressure or fast pump down from atmospheric conditions.