Replacement flow control valve?

nz · June 12

Still learning about hot water heat, only been in this house for 10 months. I fixed a lot of bleeder valves over the winter but there was one baseboard that wouldn't heat up. I bled all the air, and the supply pipe was warm but the radiator never heated up unless I bled a lot of water out too (just as an experiment.)

I think this valve is frozen shut, and despite all my attempts to open it, they have failed. I think this is a flow control valve, it had a knob on it at one point I'm sure like the rest of the house.

I'm thinking about replacing it with this danfoss double solder TRV. I installed 15 TRVs at my old house that had steam successfully, but given my inexperience with hot water I thought I would check with the forum first. Is this Danfoss valve (plus the operator) a suitable replacement?

https://www.supplyhouse.com/Danfoss-013G8044-3-4-Straight-Thermostatic-Radiator-Valve-Double-Solder-Union

Thanks,

Nick

EdTheHeaterMan · June 12

That valve Danfoss valve looks fine.

Here is a booklet that may help you understand Hot Water systems
http://media.blueridgecompany.com/documents/ZoningMadeEasy.pdf

hot_rod · June 13

I don’t recognize that as a TRV, probably a manual valve of some sorts. Although it looks more engineered than a globe or balance valve?

If you put a TRV there, any baseboard in series with that one will be regulated also, by the temperature at that location.

Alan (California Radiant) Forbes · June 13

The stem probably stuck out of the baseboard cover with some kind of handle on it. TRV? I have no idea what that capped port is for. Adjustment?

mattmia2 · June 13

You might open it up and see what's inside. It should unscrew.

Replacement flow control valve?

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