Im pretty sure its a yes, but dont know for your engine.
I have blanked my Nav's EGR resulting in the engine being much smoother. Its well worth it. Not been through a MOT yet, but I know plenty of blanked vehicles that have fine.
Yes it can be done mate, cant remember what the RD28TI EGR
valve looks like though. I can show you pics of the RD28T that
mine has, if its not the same i will try and fine the ones you need.
try this link, its from a french site that i'm a member on, if you
dont do french copy and paste into google translator or something,