The new HeptaDry line of dry pumps from Pfeiffer Vacuum is very well suited for low- and medium-vacuum applications. These pumps are designed for all areas in which oil-free vacuum is required. Rugged and dependable, they offer pumping speeds of from 100 to 600m3/h. HeptaDry pumps are suitable for use as stand-alone pumps for processes of up to 10-1mbar. And when used in combination with Pfeiffer Vacuum Roots pumps, they supply an ultimate pressure of up to 5 x 10-3mbar. This good ultimate pressure enables them to be used throughout a broad range of pressures.
One special advantage consists of their coated, single-piece, variable-pitch rotors. The internal compression makes for low energy consumption. And the innovative design and slow speed of these pumps is gentler to bearings and seals. High quality axial face seals between bearings and suction chamber afford increased reliability.
