Thank you both!
Excellent info. Comparison of stock color is amazing and very insightful! KR should indeed be the choice.
Few things I have learned from your posts and on other online sources. In the end, I discovered something (maybe) unexpected :-).
- Valve: Indeed, the WMF valve is the same as the KH valve (non-venting). Non-venting is indeed the most important thing (as per stock clarity/color comparison picture).
- Cooking time: In terms of cooking times, there is a table that indicates that on 13 psi you should add 2 minutes per every ten minutes of cooking time (http://missvickie.com/workshop/schoolframe.html)
- FYI, I discovered that WMF operates at 14psi on the second ring and reaches 119C (as per the online manual). The regulating pressure is 19psi.
Unexpected discovery: Everyone assumes that KR develops 15psi at the second ring. In one of the articles mentioned in your replies, Dave Arnold says "I always push the valve a little past the second ring, so I probably go slightly above 15 psi."
However, the KR user manual (http://www.kuhnrikon.ch/dms/ch/PDF-de-fr-en/duromatic-ga-de-fr-en/index.html), page 61, states that the second ring indicates the pressure of 0.8 bar, which according the bar-psi chart (http://www.britishmetrics.com/pis-bar.htm) equals 12 psi.
I find it interesting that it is a common perception that the second ring = 15psi, when the KR manual says it is not. Maybe they adjust the products differently for American and European markets? Or maybe I got something wrong. Probably too much looking into psi data and numbers over the past two days :-).
Cheers again,
Ivan