Here are the key parts and functions of a pressure cooker:
1. Pressure gauge - Indicates the pressure and temperature inside the cooker during processing.
2. Pressure regulator weight - Regulates the pressure inside the cooker by closing the vent pipe. It has holes corresponding to desired pressure levels.
3. Vent pipe - Where the pressure regulator weight is placed. It releases steam when open.
4. Wingnut - Secures the lid tightly to ensure proper sealing during processing under pressure.
So in summary, the pressure cooker uses a pressure gauge to monitor the internal temperature and pressure. The pressure regulator weight and vent pipe work together to control and regulate the pressure inside the cooker for safe processing. The wingnut helps seal