Attic is a sauna
Comments
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What do you have on it for a vent. An adjustable may make sense. Ventrite #1 adjusts all the way down to fully closed so if you think the radiator is oversized it may be a good option.0
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Is this a 1 or 2 pipe system?
With it off how is the rest of the system behaving?
If it's a 1 pipe system and you sometimes want heat up there I'd recommend several changes.
First, I'd try a TRV with a Gorton 5 vent on it. If it still seems to overheat at times I'd swap that #5 vent for a #4 and then drill and tap the pipe side of the radiator, or the pipe it self and add a Gorton #5 or even a #6 to it. My reasoning is a #4 is very slow and you'd likely end up with issues with steam taking too long to get up to the radiator. The added vent on the pipe side would get steam up there fast, but then force the radiator to heat slowly giving the TRV more control.
If you literally never want heat up there and don't care I'd turn the vent you have right now upside down and leave the valve on the pipe wide open. If the vent doesn't want to seal upside down you can remove it and install an 1/8" NPT pipe plug.
Chances are the TRV + Gorton #5 would work good enough for you.
Single pipe 392sqft system with an EG-40 rated for 325sqft and it's silent and balanced at all times.
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Thank you for the comments. I will tinker w/ some other vents or upside down valve as its comfortable enough up there w/ just the rising heat from the rest of the house. Its a 1-pipe system.0
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@gabesteamheat
This is a really good TRV and it comes with a fairly decent vent.
https://www.supplyhouse.com/Macon-Controls-MAC-OPSK-W-EVO-1-8-Threaded-One-Pipe-Steam-Straight-Valve-Assembly-with-EVO-28-Operator
All it is, is a thermostat that opens and closes on it's own to allow the vent to work. If it's warm enough up there it doesn't let it vent.
Basically, makes the radiator it's own zone.
But, they only work well if the system is already fairly balanced.Single pipe 392sqft system with an EG-40 rated for 325sqft and it's silent and balanced at all times.
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@ChrisJ The diagram in the Product Overview on Supply House web site says the valve is 6" long. I have 4 radiators under windows pretty much in the corners of their rooms. In fact the 100 year old window trim essentially butts up against the corner wall. I wonder how much having the thermostatic sensor that constrained would affect the ability to sense the overall temperature in the room.
The trim is no more than 4" wide, so the valve may not fit anyhow.
What say you?
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SteamingatMohawk said:
@ChrisJ The diagram in the Product Overview on Supply House web site says the valve is 6" long. I have 4 radiators under windows pretty much in the corners of their rooms. In fact the 100 year old window trim essentially butts up against the corner wall. I wonder how much having the thermostatic sensor that constrained would affect the ability to sense the overall temperature in the room.
The trim is no more than 4" wide, so the valve may not fit anyhow.
What say you?
Would this help in your situation?
I'd want it kind of out in the room, mine are against the wall like normal, but not really trapped in a corner.
Actually that's not true, I do have one near a corner that's behind a couch and it actually does alright surprisingly. It can't be blocked, there does need to be some airflow from the room around it.
Single pipe 392sqft system with an EG-40 rated for 325sqft and it's silent and balanced at all times.
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