Thoughts on series piped panel radiators with diverter valves

RedHook

Hi,

I am retrofitting my small 400 sq ft apartment with wall mounted panel radiators. Currently I have oversized cast iron radiators but they are mounted terribly and take up too much space.

The plan right now is to put in a loop of 4x radiators. The current piping is in series, into the first one, then on to the next one etc.

I see these companies offer "H" valves for the panel mounting and have solutions for using the TRV built in for series piping by using the diverter type hookup.

The Caleffi 3012 cut sheet calls out:

The diverter style offers an adjustable by-pass to send 30% to 50% of flow toward the radiator, factory-set for 35%. In addition, the diverter style contains a unique thermal break device in the return side (right leg) to prevent undesirable flow to the radiator due to thermo-syphoning when the thermostatic valve is closed, no call for heat.

Im trying to wrap my head around this. Does this mean if it is set to 30% bypass if the TRV is full open 30% goes to the radiator and 70% bypasses. If the TRV is closed down all the way 100% flow to the next radiator?

Anyone use these before?

Would love insight.

Thanks

Brian

Paxton Controls Corp