Hello, below are some specs I was provided of a micro screw air compressor, its physical dimensions are 4x4x4 and it seems pretty impressive for its size. However I am trying to understand a few things about the data that was provided. I am provided 6 charts on power/airflow/psi etc, each chart rates a specific discharge pressure in relation to increased hp and rotor speed and power consumption. The 6 charts are power/airflow/hp specs for: 7.3bar, 8.3bar, 10.3bar, 12.3bar, 14bar and 15bar. Each chart measures: A:Tip_Speed B:Rotor_Speed C:Discharge_Pressure D:FAD E:Power F:Specific_Power: Question 1: As rotor speed, HP, power and CFM increase, how come the discharge pressure (bar) doesn't increase or decrease accordingly? Chart 1 rates rotor speed at 4,900 RPM thru 22,000 RPM (accordingly power consumption, CFM increase with RPM), but the pressure (bar) remains constant at 7.3bar. How is that everthing else increases but the bar stays the same? Charts 2 thru 6 all reflect the same thing in described in Chart 1 but rated for the different bar measurements, as everything else increases the discharge pressure remains the same (above: 8.3bar,10.3bar,12.3bar,etc). Question 2: The final column is "specific power" defined as: kw/m3/min. Can someone explain this? To me it looks like kilowatt/meters cubed/minute. If I am correct, then the relationships don't make sense to me, one example is: kw/m3/min=9.514. What does this mean? Question 3: Is determining PSI is as simple as: PSI = bar x 14.504, so 7.3bar = 105.8 PSI ? Question 4: Compressors typically have tanks on them to sustain/build pressure. What if a compressor is used without a tank, simply feeding the outlet (discharge pressure) valve directly to the device its meant to power (in this case a vortex tube)? Is a tank required to sustain the pressure or can a compressor that is capable of 100 PSI be able to sustain that pressure on its own, without a tank? The inbound air to the compressor is going to be standard room air pressure. Question 5: If a compressor is pushing 100 PSI at 2.5CFM, and a vortex tube requires 100 PSI for 20CFM...is the vortex tube going to work to capacity considering the intake PSI is met via the compressor? Because the compressors 2.5CFM is considerably less than the vortex tube's CFM - will there be an impact on the vortex tubes capability? Thanks for your time and your responses.