What was the fixed operational pressure range for traditional stovetop pressure regulators?
Answer
10 to 15 pounds per square inch (psi) above atmospheric pressure
The stovetop evolution of the pressure cooker maintained the fundamental mechanism derived from Papin's design, relying on a mechanical pressure regulator or weight valve. This valve was engineered to vent steam automatically only once the internal pressure surpassed a specific, fixed operational level. This fixed operational standard was consistently set in the range of 10 to 15 pounds per square inch (psi) above the ambient atmospheric pressure. This mechanism acted as an automatic safety release, ensuring the cooking environment remained within these established limits unless the vent itself became obstructed.
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