4 CFM Vacuum Pump ROB15400 Robinair

Features and Benefits:

• Features Gas ballast
• 1/4" and 1/2" MFL intake fitting
• 2-stage
• 1/3 HP motor
• Over-the-counter replacement warranty
• 15 microns ultimate vacuum
• Made in USA

This is designed with the Iso-Valve, which isolates pump from system, making it easy to measure rate of rise. Also its offset rotary vanes work in conjunction with vacuum pump oil to create a powerful compression inside the pumping chamber. Its gas ballast feature helps keep oil clean for longer time by introducing a small amount of dry atmospheric air to prevent condensation of moisture within the pumping chamber.