Lockshield valves

[Maxx470]

Hi,
I am trying to balance my rads, unforntunaley the plastic caps are missing so I'm not sure which is the lockshield valve. Is it on the flow as I think ?.
Whats the easiest best way to identify and adjust.

Thanks in anticipation.

 

[seco services]

flow is the wheelhead
return is the locksheild.

 

[USEFULDIBDOB]

that's if there piped up right, ( unless you have duel flow valves ) one way to test which side the flow is, turn your heating on and see which tube on your rad gets hot first,

 

[Maxx470]

So the coolest / return is the lockshield ?.

 

[seco services]

you got it.