Yep, every time. It's hot side equipment -- it doesn't need to be sparkling. Just like your dirty valves didn't cause problems.
I know my cleaning regimen produces excellent results without scrubbing (including valves) so I feel confident there's nothing inside my chiller. With less thorough cleaning methods I could maybe see reason to be concerned.
Didn't say it couldn't be done. I am sure I don't clean anywhere near where others would find acceptable in areas. I just prefer to be able to see that my chiller is clean. I will soon have a pump on my Unibrau that is in shipping. It will have to be cleaned in place. I am not going to take it apart every time to clean.
On a side note I did replace that grungy brass ball valve with a 3 piece stainless steel ball valve so I could occasionally take it apart for a thorough cleaning.