Not including drain down time and re-fill time. I would say that 10-15 mins per rad would be well in, assuming no pipework changes other than perhaps cutting 2 or 3mm off the top of the pipe if needed to fit the new valve.
Why not include drain down and refilling time ? It can vary tremendously. It was a 14 rad system (2 already had TRVS) on three floors, so lots of exercise on refill. I certainly wasn't going to risk 'bunging' the rads with brand new white carpets everywhere. The microbore was a nightmare as it came out of stud walls at an angle very tight to the rad and getting the mini hacksaw onto the olives was so tight the saw stroke was very small without knocking large chunks out of the plasterboard. In fact now I remember it was so tight I had to cut through the nuts first to get to the olives so they took longer than usual to saw through and there was no 'spare' pipe if i did foul up...which is why it took longer.
I really don't need a know it all a*se like namsag telling me my job. Unlike him however I don't claim perfection. Perhaps he needs his nuts sawing off as well.....
Alfredo
