This RS-1.5 single stage rotary vane vacuum pump , 3.5/4CFM electric vacuum pump,it is designed for the working HVAC technician, and feature stable vacuum degree and excellent service. They are small, lightweight and compact housings with dedicated dual voltage configurations,110V/60HZ or 220V/50HZ. The Pumping speed is 3.5 CFM or 4 CFM, 1/3 horsepower, and ultimate vacuum is about 0.02 mbar, 15micron. · Oil drain plug positioned at Bottom of an oil tank. Internal high volume cooling fan for extended use life, it is thermally protected. · Exhaust port with exhaust cap, direct drive motor allowing easy starting which is maintenance free. · Large oil sight glass for monitoring oil levels, ON/OFF switch. · Non-slip cushion handle, the vacuum pump will be packaged with a bottle of vacuum pump oil when delivered. · Environmental Design - The tank has been equipped with separating devices at the exhaust port to prevent oil spraying and to reduce pollution. · Oil anti-backflow valve design: The gas inlet is specially designed to prevent oil from flowing back and polluting the container and hoses. 

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