First, I understand that the boiling point of water is increased as the pressure is increased. At 15 PSI, the boiling point is about 250F.
My question, which seems like nobody can answer with certainty, is this: Is there a continuous boil within the pressure cooker once it reaches temp/pressure?
I understand that there needs to be a boil at some point to create the steam. But once it reaches that pressure, then what? An electric PC will turn the heating element off until the pressure drops. A user will turn the heat down on an analog PC. Does the liquid just boil constantly while the heat is off? It probably maintains temp & pressure for a lot longer in a sealed environment. In my mind, if there were a continuous boil, that steam can only build so much until it exceeds the pressure that the PC is capable of maintaining and it begins to vent. So, sure you could have a constant boil, but that means it would also be constantly venting, right?