Disassembling EGR valve?

[iRonin]

(02-06-2018 )alborz Wrote:  Thanks Rawze
The problem is that it doesn’t move freely. Somehow it gets stucked when pushed down. Even the spring can’t pull it up.

That's exactly what happened to my EGR valve couple years ago at Rawze place. It was even long fight to take it off its seat. It stuck deadly. It also stuck the same way, in opened position, that even spring couldn't push it back to close.
Rawze's verdict was "it's dead", so we bought the new one.

Sometimes you can't do anything but replace the failed part...