Fagor TWIRLOCK User Manual page 10

8. Safety Valve: Located under the lid handle. The safety valve is activated in
case of an excess pressure build-up. The pressure cooker cannot be opened
if there is still pressure inside the cooker.
9. Thermo Heat Conductive Base: Since the objective of a pressure cooker
is rapid cooking, the bottom of the pressure cooker pot has a thermo
heat conductive base, comprised of three layers of metal. The first layer is
stainless steel, which is safe for contact with food. In view of the fact that
aluminum should not be in contact with food and it does not have magnetic
properties, the aluminum middle layer is sandwiched between the two
outer layers. Aluminum is the best heat conductor and therefore provides
faster and more even heat distribution. The last layer is stainless steel with
magnetic properties, making the pressure cooker compatible with induction
cooking.
10. Pressure Indicator: The pressure indicator is the red tipped rod, located on
top of the lid handle. It indicates whether there is pressure inside the cooker.
As the pressure cooker heats and pressure builds, the pressure indicator will
rise automatically producing a slight amount of steam that escapes from the
pressure valve. If the pressure indicator is raised, there is pressure inside the
cooker and the pressure cooker cannot be opened. The pressure lock on
the lid will be blocked and will not slide to the open position. If the pressure
indicator is not raised, there is no pressure inside the cooker, and you can
safely open the lid.
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