Robinair's CoolTech 4 CFM Two Stage Vacuum Pump has a 1/3 HP motor. Two stage design. 1/2" ACME and 1/4" MFL intake fitting. Iso-Valve™ isolates pump from system, making it easy to measure rate of rise. Vacuum pump efficiency depends largely on the purity of the vacuum pump oil. The gas ballast feature helps keep the oil clean for a longer time by introducing a small amount of dry atmostpheric air to prevent condensation of moisture within the pumping chamber. Two stage design for greater efficiency—the second stage of the two-stage design starts pumping at a lower pressure to pull a deeper ultimate vacuum. The inlet filter prevents contaminants from entering the pumping chamber; check valve prevents oil from backing up into system during a power outage. Heavy duty motor is easy to start and efficient to operate. The power switch is located on the handle assembly to protect it from accidentally being turned on or off.
Features
Gas ballast keeps oil clean and dry
Inlet feature prevents pump contamination
Evacuates today’s tighter systems with their increased sensitivity to contaminants
Offset rotary vanes work in conjunction with the vacuum pump oil to create a powerful compression inside the pumping chamber
Sure grip handle stays cool to the touch and directs exhaust away from you
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