The safety valve will also operate if there is insufficient water in the pressure cooker and it boils dry, causing the temperature to rise beyond the normal operating range. The fusible alloy in the safety valve melts at the required temperature and releases pressure. The safety valve can be replaced as shown here.
This item is in the category "Home & Garden\Kitchen, Dining & Bar\Small Kitchen Appliances\Pressure Cookers". The seller is "a2z_exports" and is located in this country: IN. This item can be shipped worldwide.