Lockshield + wheelhead valves

[flycop2000]

I am replacing a couple of radiators in large room where the room stat is located. I have two spare lockshields from previous work. Can I use lockshields in place of the wheelhead valves? Are they they both the same inside, just different tops ? Does a wheelhead valve open up more than a lockshield to allow a greater flow of water into the radiator?
Sorry if theses are simple questions ? i'm not a heating engineer, just a keen DIYer.

 

[smoggs03]

just different plastic tops!! so yeah just do it!!

 

[flycop2000]

Great, thanks for the quick reply.

 

[piperdave]

as said exactly the same just different tops mate

 

[Plumbstar Tom]

yeh the locksheilds are to stop the home owner from unbalancing the rads

 

[doitmyself]

yeh the locksheilds are to stop the home owner from unbalancing the rads

That assumes the installer has balanced them. A dangerous assumption, particularly if TRVs have been fitted.

 

[Plumbstar Tom]

Its still the reason for them though isn't it?

The idea being its awkward for the homeowner to adjust them and only a plumber can

Whether the installer has balanced the rads or not the purpose of the locksheilds remain the same

 

[dontknowitall]

Strictly speaking, if you're changing valves on a radiator then you should be fitting TRVs in accordance with the building regulations.

 

[flycop2000]

I always thought that the radiators in the room with the thermostat should not have TRV's fitted ?

 

[Plumbstar Tom]

I always thought that the radiators in the room with the thermostat should not have TRV's fitted ?

correct

 

[dontknowitall]

That is correct but the other radiators should have them.

 

[flycop2000]

All my other radiators have TRV's.

Thanks to everyone for the quick replies.