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Pfeiffer Launches Two-Stage Rotary Vane Pumps

Pfeiffer Vacuum has introduced the Duo 125 and Duo 255 two-stage rotary vane pumps. The Duo 125 and the Duo 255 are used when industrial or scientific vacuum applications necessitate dependable pumps for high pumping speeds of between 120m3/h and 250m3/h in the low- and medium-vacuum ranges. These pumps are suitable for use in high-vacuum pumping stations in combination with turbo pumps or as backing pumps for Roots pumps.

Typical low- and medium-vacuum industrial applications include vacuum drying, metallurgy or coating. The Duo 125 and the Duo 255 complement the Duoline series of rotary vane pumps, which is characterised by compact diameters, high pumping speeds and low noise levels. As the needle bearings are free of nonferrous metals, these pumps are insensitive to dust, dirt and corrosive gases.

The integrated-pressure oil lubrication system improves oil circulation and cooling. The improved cooling of the pumps makes for long service life, according to the company. A hydraulic safety valve is claimed to assure a high level of operating reliability. Accessories broaden the range of potential applications while increasing operating reliability.


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