How do radiators affect each other?

[TSN79]

Here is a basic question about radiators;
When all radiators on one spesific string are fully open all is fine, but if some of them shut off their supply due to whatever reason, won't that increase the supply to all the others on that string...?

 

[russ_watters]

Depends on the piping arrangement and other factors. If they are all in parallel and don't have 3-way valves and bypass and the pump doesn't have a pressure controller, then yes.