Premier Inner Lid Stainless Steel Pressure Cookers whistle in millions of kitchens in the world because they offer the healthiest mode of cooking by conserving vital nutrients, vitamins and energy. safe, reliable and long lasting as well. Premier’s Multiple Safety System, that is built into every cooker. Also, the way it is designed, helps to conserve fuel and time through quick and even heating. WEIGHT VALVE (PRESSURE REGULATOR) The weight valve maintains and controls the steam pressure inside the Pressure Cooker at a constant level while cooking. It continuously releases out the excess steam from the Pressure Cooker. SAFETY VALVE In case of any excess pressure (in-spite of the Weight Valve release facility and Gasket Release System) the Safety Valve provides an escape outlet. The Safety Valve contains a special fusible alloy pellet that melts when the temperature in relation to the pressure rises beyond safe levels.