What type of valve is this

[messimagician]

I've not seen these before but they don't look like your typical lock shield valve, can you isolate these to remove a radiator ? the opposite side as the manual TRV

http://img.photobucket.com/albums/v136/cpuspec/Mobile Uploads/IMG_20150130_094112.jpg

 

[xr4x4]

If you unscrew the cap, there will be a screw underneath to turn off.

 

[Burnerman]

Are these the ones with the metal taper seal, that leak like a sieve?
Seem to recognise them......
John

 

[Dan Robinson]

Don't even think about trying to adjust the fooker

 

[messimagician]

haha thanks, i'll leave it for now until i'm ready to replace the radiator with new TRV's

 

[Burnerman]

Don't even think about trying to adjust the fooker

I did.....huge mistake
Ended up stop ending both pipes.....worse still, 'er indoors had the glad rags on for a day out (cancelled).
I recall being more popular......serves me right for being a smart ass
John