Quote:
Originally Posted by flybouy
Not wanting to start an argument but someone smarter than me would have to explain this. My understanding is there are two parameters, flow and pressure. Flow is measured in CFM (cubic feet per minute) and pressure measured in PSI (pounds per square inch).
If a compressor is rated at 150 psi then it should be capable of filling the tank to 150 psi. The tire is a container the same as the tank, just larger. That 150 psi doesn't know what size container it's filled, that's simple physics. Now, if you have that 150 psi tank and a regulator set to say 80 psi on the output side ( the hose) then the regulator will limit that pressure available to 80 psi on the hose.
The volume of air being moved (CFM) will have an effect on how long it will take for that compressor to attain the rated pressure. So obviously a high volume pump will fill a given size container faster than a low volume pump.
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Yes.
Common air compressors are positive displacement with pistons and valves. Think like a car engine. They will keep pumping until something breaks. Pressure regulated by, wait for it...a pressure regulator.
There are centrifugal air compressors which can be limited by back pressure. These are mostly in industrial process service. Usually multistage, commonly 3 impellers with their shafts gear driven by the larger 1st stage shaft, aka: bull gear. Pressure and flow usually regulated by "kick back" valves. Discharge dumped back into suction.