Hot radiator return pipes but warm flow pipes

[Bp89]

Although my CH radiators are hot to touch eventually, I have noticed that one in the downstairs sitting room and probably one of the last to get really hot, has a warm flow pipe and a very hot return pipe. The same applies to some of my other radiators but not all. Is this a balancing issue?

Thanks.

 

[exedon2]

Chances are the hot pipe is flow .
The flow won't necessarily be onto thermostatic valve (bi directional valves)

 

[Bp89]

Chances are the hot pipe is flow .
The flow won't necessarily be onto thermostatic valve (bi directional valves)

Thanks. In that case there is quite a difference in temperature between the two pipes on some of the radiators.

 

[exedon2]

What boiler do you have? Make model we can then give you some idea what return temperature you can expect.

 

[Bp89]

What boiler do you have? Make model we can then give you some idea what return temperature you can expect.

It's a Worcester Bosch Greenstar Ri 24r.