pressure cooker

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Pressure Cooker
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How does a pressure cooker work?

• Pressure cooking principles are
• quite simple a higher
• temperatures and higher
• pressures inside a pressure
• cooker cook foods much faster
• than conventional methods
• since the food is being cooked
• with steam.

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Different generations of pressure cookers

• First Generation
• Second Generation
• Third Generation electric pressure cookers

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First Generation

• Also known as "old type"pressure
• cookers, these operate with a
• Weight - modified or "jiggly"
• valve, which releases pressure
• during operation.

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Second Generation

• These operate with a spring-
• loaded valve that is often hidden
• from view in a proprietary
• mechanism. Some of these
• pressure cookers do not release
• any steam during operation and
• instead use a rising indicator with
• markings to show the pressure
• level.

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Third Generation Electric pressure cookers

• These include an electric heat source that
• is automatically regulated to maintain the
• operating pressure. This pressure cooker
• type cannot be opened with a cold water
• quick-release method and should be
• operated with caution when releasing
• vapour through the valve, especially while
• cooking foamy foods and liquids.

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Advantages of the Pressure cookers

• Foods cook much faster
• Pressure cooking requires much less
• water
• Vitamins and minerals are not
• dissolved away by water
• Pressure cooker required Less energy.
• Food is cooked at a temperature
• above the normal boiling point of
• water, killing most micro-organisms.

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Disadvantages of the Pressure Cooker

• Pressure cookers are considerably more
  expensive
• The additional gasket (sealing ring) requires
  special care when cleaning.
• In order to inspect the food, the pressure
  cooker needs to be opened, which halts the
  cooking process.

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Safety features

• Early pressure cookers equipped
• with only a primary safety valve
• risked explosion from food blocking
• the release valve.
• Modern pressure cookers sold from
• reputable manufacturers have
• sufficient safety features to prevent
• the pressure cooker itself from
• exploding.

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