Powered by compressed air, E-Vac Series is comprised of low-vacuum units up to 21 in. Hg for porous materials and high-vacuum units up to 27 in. Hg for nonporous materials. Vacuum pumps are available in various sizes and flows, and selection of suction cups is available for range of applications. Engineered to minimize air consumption and increase cycle speeds, generators have in-line, single stage design that delivers consistent, steady vacuum without fluctuations.