Rothenberger ROAIRVAC 9.0 CFM (Manufacturer Model Number: 1700.64). It is one of the most powerful professional models in this series, designed to meet the needs of large and heavy-duty air conditioning and refrigeration systems. Here are the complete precise technical specifications for this model according to the manufacturer: 1. Performance and Capacity * Air Flow Rate: 9.0 CFM (Cubic Feet per Minute), which is approximately 255 liters/minute, giving it high speed in evacuating large systems. [1] * Stages: Dual Stage with a rotary fan design for high-efficiency evacuation. [1, 2] * Ultimate Vacuum: Reaches 25 Microns, an excellent vacuum level that ensures complete removal of moisture and air within the circuit. [1, 2] 2. Electricity and Motor * Voltage: Operates on a 230V system (at 50 / 60 Hz frequency). * Motor Speed: 1720 RPM at 60 Hz frequency. * Thermal Protection: The motor is equipped with a built-in Thermal Switch that automatically disconnects the pump if its temperature rises, protecting it from burnout. [1, 2, 3, 4] 3. Connections and Oil * Connections: The main port comes with a standard 1/4 inch SAE size, and the pump supports adapters in 5/16 inch and 3/8 inch sizes to be compatible with various charging hoses. [1, 2] * Oil Reservoir: It has a clear Sight Glass for easy monitoring of oil level and purity, as well as a quick-release bottom valve for draining old oil when needed. [1, 2] 4. Additional Safety Features * Solenoid Check Valve: Built-in to protect the air conditioning system; it prevents the backflow of pump oil and contamination of the refrigeration network in case of sudden power failure. * Gas Ballast Valve: To reduce water vapor condensation inside the pump's oil tank, thus maintaining oil efficiency for a longer period.