4 CFM Vacuum Pump

Robinair vacuum pump features below. See Specifications tab for voltage, micron rating, recommended uses, dimensions and more.

• Iso-Valve™: Isolates the pump from the system with just a quarter-turn
• Gas ballast: Allows moist air to pass through the pump to mix with dry air, reducing condensation
• Heavy-duty motor: Sealed bearing, high-torque design for easy startup and efficient operation
• 2-stage rotary vane design: Powerful, quiet high vacuum capability for maximum moisture removal and reduced evacuation time
• Offset rotary vanes: Unique design builds more compression, reducing system pressure and removing more moisture
• Molded polycarbonate base: Reduces vibration and provides balance during operation
• Angled oil drain valve: faster, more complete draining
• Top oil fill port: Better access when refilling oil
• Cast aluminum body: Lightweight and durable die-cast aluminum reduces weight and creates a strong, durable pump
• Quality: Performance-tested to meet Robinair’s quality, durability and longevity standards
•  Intake screen: Prevents foreign matter from entering pumping chamber. External exhaust filter separates oil vapor from exhaust flow
• Brass intakes: Reliable brass intake valves with Flare, ACME or both style fittings with tethered caps
• “No Hassle” warranty: Exclusive over-the-counter replacement warranty. Robinair pumps can be returned to a distributor for an immediate exchange. U.S. and Canada only. In other locations, see your Robinair distributor
• Multi-use: Designed for use on A/C-R systems using CFCs, HCFCs, and HFCs in conjunction with mineral oil, ester oil, alkyl benzene oil, and PAG oil as lubricants
• Not for use with ammonia or lithium bromide systems
• Not for use with A4L or other flammable refrigerants