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2-stage vacuum pump ROAIRVAC 3.0 The Rothenberger ROAIRVAC 3.0 is used to evacuate all refrigeration circuits according to DIN 8975. The two-stage rotary vane pump achieves a vacuum of less than 25 microns. This makes them ideal for all refrigeration plant engineers and technicians. ITEM NUMBER 170062 PRODUCT PROFILE 4-pole motor for increased torque and long service life Magnetic check valve to protect the refrigeration circuit from oil contamination in the event of power failure Vacuum gauge with integrated slave pointer allows easy and quick control of the evacuation process Protection of the internal components by a light and high-quality housing Gas ballast valve for reducing the water vapor in the oil tank Special filter reduces oil mist on the exhaust nozzle Easily readable oil level through sight glass Easily accessible oil drain plug for quick drainage Thermal switch protects the unit from overheating the motor Standard 1/4 "SAE connector, as well as 5/16" SAE and 3/8 "SAE adapters included Removable cable prevents cable damage