Pfeiffer Vacuum Inc.Maintenance-free magnetically coupled roots pumps are statically sealed against atmosphere, eliminating rotating seals that wear and leak. Higher uptime and lower operating costs can be expected by the elimination of radial shaft seal maintenance requirements. The pumps are hermetically sealed resulting in a negligible leak rate of <1 x 10-5 mbar l/sec. The family of roots pumps ranges from 250 to 6,000 m3/h.
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