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From: Guy (
Subject: Purge method
Date: February 28, 2005 at 12:24 am PST

In Reply to: Thanks for the recipe and question.... posted by Shelly on February 17, 2005 at 1:47 pm:

Rinsing may have some effect but adequately purging immediately after lid closure should prevent any clogging.

When I first learned about purging a pressure cooker of oxygen, I realized that I had been manually over-riding the automatic purge feature on two of my pc's for a couple of years. There is an extra valve on units which have this feature. It is a pin which rises and seals the pc when enough boiling and steam action has been achieved to physically lift the pin into a sealed position. When I first noticed my then new pc's "leaking" steam through a funny 2nd valve I used a table knife to reach in and pull the pin up to close it. Quite often, even though I used a couple of teaspoons of oil, my pc's would clog and spit gooey food all over the back of the stove because I did not allow the units to automatically purge themselves. Once I realized my mistake I have never had another incident with clogging. I use a pc about a dozen times each week. That comes out to about 500 times each year and it has been at least five years since I learned how to solve foaming problems in pc's. That's at least 2,500 consecutive times with no clogging of valves. (using ZERO oil and cooking lots of foods that are notorious for foaming such as brown rice & oats-BTW, oats may be the worst offender) You should be able to manually purge your pc to get similar results. Hope this helps. Good luck

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