Radiator TRV snapped off - recommend adhesives

[batdog]

Whilst moving a suitcase I managed to snap off the head of a radiator TRV. It's quite a clean break, leaving the lowest plastic bit of the head still within the knurled ring.

I'll get a new TRV but as a short-term fix I'm looking to glue it back together. Is there a specialist plumbing adhesive for plastic that will cope with the heat passing close to the TRV?

Thanks.

 

[seco services]

doubt if it will hold the pin on the trv has got quite abit of pressure pushing up on the head.

 

[big-all]

swap head with the radiator in the house that is required to be on the longest

or the smallest radiator
or a radiator you can do without and turn the locksheild noting how many turns required to turn it off