TRV trying to identify

[Cowboys]

Good afternoon all,

We have these TRV's fitted to our radiators and I was hoping someone could identify the make and advise if you can still get them. Unlike standard types that allows you to unscrew the actuator I am baffled as to how they come apart.

Many thanks Bill

 

[HERTS P&D]

Round ring pulls up.

Andy

 

[Cowboys]

Andy you're a star. Any idea of the make and if you can still buy replacements.

Bill