Those look exactly like the ones I use but I don't recall the exact specs. There is a very good thread around here that talks in depth about valves, although if you are confused now...it will likely make you more confused. HA.
I'll find it and update this post...
Edit: (Not being a prick, I know they can be hard to find)
http://www.homebrewtalk.com/f11/brutus-ten-44403/
This thread is long, but a very good read.
ASCO and STC are the two commonly used. Both work admirably. Some of the 'debate', for lack of a better term, is that the appropriate valves aren't being used for this specific application. i.e. Water & Air rated valves are being used for gas and a "Use at your own risk" warning has been suggested. Valves that are truely rated for this type of gas application can be costly for a homebrewing environment.
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