SIHI^dry - Dry Running Vacuum Pumps are completely dry running vacuum pumps used increasingly throughout the process industry where there is a growing demand for uncontaminated vacuum free from oil or service liquid, low operating pressures, flexibility, and low life-cycle costs. The SIHI^dry vacuum pump is a vertical twin-screw machine that is completely dry running and has no mechanical shaft seals. Moreover, the hermetically sealed unit has been developed specifically to meet these demands, while maintaining a simple, cost-effective solution.