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With the GVD-28, Atlas Copco (parent company to Edwards) delivers an improved two-stage oil-sealed rotary vane pump. The newly optimized high-efficiency motor design of the GVD-28/E2M28/30 draws less operating amperage than previous generations. Technical Specifications Atlas Copco GVD-28 22 CFM (at 60 Hz. operation) Ultimate Vacuum: 7.7X10-4 Torr Atlas Copco GVD-28 Like New Rotary Vane Pump $4,000.00 each Three Phase Operation 230/460 V 50/60 Hz. Buy it now Atlas Copco GVD-28 Like New Rotary Vane Pump $4,000.00 each Single Phase Operation 110-120/200-240 V 50/60 Hz Buy it nowFull Article