How is the DUROMATIC pressure cooker different from my Grandmothers?
The spring-valve of the DUROMATIC pressure cooker makes pressure cooking much easier and less frightening than Grandma’s cooker, because the loud hiss of steam escaping has been completely eliminated. In addition, the DUROMATIC valve allows the user to determine the exact time at which the interior of the pan comes to pressure and, thereby, affords much greater accuracy in the cooking. How it works: Two red rings are visible on the stem of the valve during cooking. When the first red ring appears, the internal pressure has been raised 8 pounds per square inch above the external pressure (medium pressure). When the second red ring appears, the internal pressure has been raised 15 pounds per square inch above the external pressure (high pressure). The weight-valve system on Grandma’s pressure cooker (and on some contemporary pressure cookers) gives no clear indication of when full pressure is achieved. The cook must guess by the amount of noise and steam escaping how much pressure is bui
