After you do this the lid will form an air-tight heat seal. When the cover is removed while cooking, heat and steam are allowed to escape. This lengthens the cooking time and dries out the food. Vacuum Release in Knob. If lids lock on when food is done, simply open valve to release vacuum and remove lid.
Cooking is done under pressure with economical low heat.
Just like insulation in your house, this cookware saves a lot of money over the years on utility bills. The built-in steam control valve whistles like a tea kettle to let you know when to turn the heat down from medium to low or simmer. The studies recommend cooking foods for a short time and in as little water as possible. Oh HECK , since your already here, why not click here and at least take a peek at what we have to offer.