Typically, boiling a pot of potatoes takes about 30 minutes in time, but if they are boiled in a pressure cooker they can be ready in about 10 minutes or less. So are you wondering how pressure cookers work?
When you heat a pot of water, it creates steam and bubbles form at the bottom of the pot and they rise to the surface of the water. At 212 degrees Fahrenheit or 100 degrees Celsius is the temperature that water begins to boil. But, this is only accurate at sea level. As you move to higher elevations, the pressure in the atmosphere falls and it causes the boiling point to also drop. Because of the lower boiling point, more time is required to cook the same foods. This is because once the boiling point of water is reached; the temperature inside the water cannot become any hotter.
A pressure cooker creates the opposite effect on cooking and creates a different environment for water to boil. Steam made when the lid is closed on a pressure cooker builds up inside. As pressure builds up inside the pressure cooker, the boiling point of the water inside also rises. Because the cooking temperature is increased inside the pressure cooker, the time needed to cook food inside it is reduced. For your average pressure cooker today, an added amount of pressure of about 15 psi is inside which allows the water to boil at around 252 degrees Fahrenheit. Because of this higher temperature, your food will cook faster inside the pressure cooker.
What size pressure cookers are perfect for your family?
There are many sizes of pressure cookers in the marketplace, the most prevalent sizes are 4-, 6-, 8-, and 10-quart liquid volumes.