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Old 11-26-2011, 10:44 PM   #11
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Quote:
Originally Posted by jes View Post
I don't think that I have seen any of the ones made in the last 20 years.
They are quite different now, jes. The one I just bought about 6 months ago has 3 (Three) pressure relief valves.
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Old 11-26-2011, 10:51 PM   #12
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We had a PC in the 70s. It had a rubber plug in a hole in the lid that would blow if the pressure got too high. It also had a rocker valve that regulated the pressure and would let excessive pressure bleed off. Finally, the gasket was designed to blow if pressure got too high. So even 40 years ago there were redundant safety systems.
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Old 11-27-2011, 01:15 AM   #13
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I have three older stainless steel pressure cookers, all Presto. 3, 4 and 6 qt. Same gasket for all. It is, as PrincessFiona60 says, "U" shaped in profile, with the open face of the "U" facing inward. As the cooker pressurizes, it expands the gasket upward, downward and outward as far as the lip of the lid will permit, sealing the cooker. Most pressure cookers also have a safety relief that will blow if the cooker over-pressurizes. Else it could become a bomb.
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Old 11-27-2011, 02:04 AM   #14
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Originally Posted by gadzooks View Post
I have three older stainless steel pressure cookers, all Presto. 3, 4 and 6 qt. Same gasket for all. It is, as PrincessFiona60 says, "U" shaped in profile, with the open face of the "U" facing inward. As the cooker pressurizes, it expands the gasket upward, downward and outward as far as the lip of the lid will permit, sealing the cooker. Most pressure cookers also have a safety relief that will blow if the cooker over-pressurizes. Else it could become a bomb.
My new Fagor cooker has a much more supple and larger lid gasket. Works a charm, loved learning how to cook in the new cookers and a smaller one came with it so it's a bit more versatile.
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