Robinair 4 cfm Vacuum Pump - RA15401

High quality 4CFM vacuum pump

• Two stage design – second stage starts pumping at a lower pressure to pull a deeper ultimate vacuum
• Offset rotary vanes – 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