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Robinair 15600 Vacuum Pump 6CFM – second stage starts pumping at a lower pressure to pull a deeper ultimate vacuum. Offset Rotary Vanes – Our proven design creates the deep vacuum conditions needed for a thorough evacuation. Gas Ballast feature – helps keep the pump oil clean by reducing condensation of moisture. Iso-Valve – isolates pump from the system with just a 1/4 turn, making it simple to measure rate of rise. Integral Check Valve – prevents pump oil from being sucked into the system if a power loss occurs. Die-Cast Aluminum housing – lightweight but durable. Molded Base – Durable polycarbonate base improves pump balance and minimizes vibration.
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