(Continued from Part 2. This concludes the article.)
The first issue when I started was using the pressure cooker even though the gasket had some very small wrinkles along one surface. On the previous two experiments the pressure hadn’t gotten above normal and the gasket held. The second issue developed after Experiments #1 and #2. The lid was harder to turn into place so I applied butter to act as a lubricant for this third experiment. The owner’s manual suggests a little mineral oil if a small amount of lubrication is needed. Too much butter making the gasket too slippery was the probable cause for the gasket blowing out at the end Experiment #3. The wrinkled gasket probably didn’t help. Take-home lesson: when the manual says to not use an imperfect gasket, they mean it! Another important lesson: if anything is amiss with a pressure cooker such as the lid being harder to turn than normal, figure out what the problem is before using it.
To try the blowout-plug test again, I removed the gasket butter with hot soapy water. I’d be standing back 20’ so if there was a malfunction again, no problem. Unfortunately, the test failed because the gasket was damaged enough that the lid wouldn’t seal and pressurize, all I saw was steam was coming out from under it. My first three experiments showed a pressure cooker can often work normally even when slightly defective, but the last experiment showed how dangerous it can be when it gets under abnormally high pressure. For that reason, don’t ever use a gasket with even small defects. Replacement gaskets are inexpensive and as always, two is one and one is none.Continue reading“Pressure Cooker Lessons Learned – Part 3, by St. Funogas”
