I'm trying to learn more about how air compressors work (not how they mechanically function - how they're input/out pressures and flow rates work) and I'm having a lot of trouble getting a specific questioned answered even after a lot of google searching. Suppose I have a compressor that the manufacturer states has a flow rate 1.35 CFM and a maximum pressure of 150 PSI (please feel free to post answers using any units, I'm not attached to the obnoxious US ones). If I'm using this compressor to fill a known volume with air of a specific pressure, how do I calculate how long it will take to fill the volume? Let's say the volume can be regulated for temperature, or that entire process is isothermal. Different sites and documents available describe different specs and calculations for air compressors but so far none of them have been much help in answering this question.