Danfoss Randall TRV. Will it leak now?

[Albumen]

I had a stuck TRV (rad cold). Found some instructions, got the plastic shroud off.

Pushed the little pin in and out a bit. Thought I'd give it a thorough waggle with pliers. The pin came right out. Then a bit of a leak through the hole it left. Put the pin back in. Doesn't seem to leak now.

It didn't actually feel like I broke anything. Is that pin 'meant' to come right out? I'd rather not replace the whole valve if I don't need to. Or can you just replace the brass valve bit without replacing the valve casing?

Thanks.

Untitled

• Albumen
• 29 Mar 2013
• 1

Untitled

• Albumen
• 29 Mar 2013
• 1

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[Burnerman]

All par for the course.....the main question is, does the rad heat up now?
You can replace just the guts of the valve, (with identical bits) but you'll still need to drain down (unless you've lots of practice with sorting things 'live' )
John

 

[Albumen]

Heating up fine now. Doesn't seem to be any leak from around the pin, presumably there's some sort of O ring sealing it.

I'll leave it as is for now. I just gave it lots of pushing in/letting go. Is WD40 recommended?

 

[Whitespirit66]

That looks like a Danfoss RAS-C TRV. The grey ring should be attached to the white head when removed, not left on the brass valve.

You need to unscrew the grey ring, then the whole head should lift off. Not sure how you seperated the head from the ring.

 

[McCombi]

That looks like a Danfoss RAS-C TRV. The grey ring should be attached to the white head when removed, not left on the brass valve.

You need to unscrew the grey ring, then the whole head should lift off. Not sure how you seperated the head from the ring.

It's not the grey ring in the pic, it's the bi-directional part you see there.

 

[muggles]

Is WD40 recommended?

Absolutely not, no. It's not very friendly on certain types of rubber seal and can cause them to rot very quickly

 

[muggles]

You need to unscrew the grey ring, then the whole head should lift off. Not sure how you seperated the head from the ring.

That grey ring is the one that you use to switch the flow direction, it most certainly should not be removed