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The
spring-valve of the Duromatic pressure cooker by Kuhn Rikon 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 timing of
cooking.
When
the first red ring appears, the internal pressure has been raised 8 pounds
per square inch (psi) above the external pressure. When the second red
ring appears, internal pressure has been raised 15 psi above the external
pressure. The Quick Cuisine cookbook (included with every cooker)
tells exactly how to use the ring indicator for each recipe, and provides
guidelines and tables for using the same techniques for any food you may
wish to prepare.
The
weight valve system on older pressure cookers and on some contemporary
pressure cookers gives no clear indication of when full pressure is achieved;
the user must guess as to when this has occurred. Kuhn Rikon's spring valve
system, by providing more accurate timing, allows superior cooking results.
A weight
valve system allows a great deal of steam to escape. When a large amount
of steam is escaping, there is a constant hissing noise, an increased liklihood
of a clogged valve, and greater evaporation of moisture. Duromatic's valve
allows cooking with less water (thereby retaining more of the vitamins,
minerals and natural taste of the food), almost eliminates clogged valves,
and is much quieter than cooking with a weight-valve system. |