Looks like the official word on Valimaki is that he's "banged up" and was game day decision for Game 4:
https://www.nhl.com/flames/news/vali...ia/c-297919940
I assume that means he would have played if they weren't in command of the series and poised to sweep.
The next round likely won't start until next Thursday or Friday, so that should give him plenty of time to recover.