I'll let you know if it is possible to break it down for cleaning.
The only way I see to be sure the valve assembly is completely clean is to put a water bath/filter between the keg/primary and the valve assembly, then I am still not sure there wont be anything in the sticky co2 beer exhaust air to infect the valve assembly, I have seen a few guys do this successfully, ie use the water bath, as they said on the internet
Taking apart that assembly and putting it back together would get old for me very quickly.
In the end I found my beer was no better when I used it (and way worse when it was infected) vs when I did not use it.
The premise of using it seemed great .... but it failed for me and my process.
I went into a phase for a while where the more gadgets and more stainless the better my beer should be, and ended up with bad results... when started to focus on ph/water and keeping my setup clean/simple and sanitized my beer turned out much better.
YMMV
thanks Kevin