frater secessus
Well-known member
Pressure cookers need a controlled heat source so they can be kept at the just right pressure point.
The regulator keeps them at the just right pressure, assuming a sufficient heat source.
Controlled heat sources during pressurization are important for canning (to stay within known-safe guidelines of the NCHFP), but the acceptable range is quite wide for cooking.
Too hot and they can explode.
PCs don't explode because they got too hot. They explode when both the regulator outlet and emergency vent are blocked or otherwise rendered inoperable. Usually as a result of overfilling so those componenents get fouled.