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Missing Radiator Valve Knob?

Cube_
Cube_ Member Posts: 5
Hello, 

I'm new to the forum and needed some help. I live in an apartment built in 1960 and we have a steam system for heat. I have 3 radiators in my apartment, 2 of which have working valves which I've managed to turn and lower the heat drastically. When comparing the 3rd one with the rest, it looks like its missing a knob to adjust the heat. 

I removed my radiator covers and took pictures of the entire system plus a close up of what seems to be the valve and where the missing knob should be on the that square nut (first two images). 

Can someone tell me if that is in fact a valve by the looks of it? And if it is, how can I adjust the heat? 




Comments

  • neilc
    neilc Member Posts: 2,667
    yeah, that's what's left of that valve, the handle would engage that squared plate,
    try an adjustable wrench, or pliers on the plate and wiggle back and forth,
    doesn't this valve body match the others in the apartment? minus the missing handle?
    known to beat dead horses
  • Big Ed_4
    Big Ed_4 Member Posts: 2,706
    Hit it with WD40 too....
    I have enough experience to know , that I dont know it all
    Cube_
  • mattmia2
    mattmia2 Member Posts: 9,467
    You could cover part of the convector element with foil to cut down the output. you can also buy a new handle for the valve. i think that valve is an american radiator company valve because of the metering adjustment.
  • Cube_
    Cube_ Member Posts: 5
    neilc said:
    yeah, that's what's left of that valve, the handle would engage that squared plate, try an adjustable wrench, or pliers on the plate and wiggle back and forth, doesn't this valve body match the others in the apartment? minus the missing handle?
    Thanks for the response.

     Yes, this valve body matches the other 2 in the apartment. I'll try some WD40 and then use a wrench to twist it to the right to close. These types of building radiators aren't ever 100% off, right? The valve controls the steam going to the bulky part with the fins but the supply line is always piping hot and that still gives off some heat to the apartment, right? 
  • Cube_
    Cube_ Member Posts: 5
    Cube_ said:
    neilc said:
    yeah, that's what's left of that valve, the handle would engage that squared plate, try an adjustable wrench, or pliers on the plate and wiggle back and forth, doesn't this valve body match the others in the apartment? minus the missing handle?
    Thanks for the response.

     Yes, this valve body matches the other 2 in the apartment. I'll try some WD40 and then use a wrench to twist it to the right to close. These types of building radiators aren't ever 100% off, right? The valve controls the steam going to the bulky part with the fins but the supply line is always piping hot and that still gives off some heat to the apartment, right? 
    Thanks, I'll try twisting the square plate first to the right and see if less heat radiates. Also yeah its probably American? Doesn't look like they've been touched since the 60s
  • guzzinerd
    guzzinerd Member Posts: 226
    edited December 2023
    Isn't there a risk of steam leaking from the valve stem if they manage to break it free?

    Bryant 245-8 2-pipe steam in a 1930s 6-unit 1-story apt building in the NM mountains.  26 radiators heating up 3800sqf.
  • mattmia2
    mattmia2 Member Posts: 9,467
    American Radiator Company is now called American Standard. Knowing the manufacturer might help in finding the right handle. It shouldn't heat at all if the valve is sealing completely but it will heat a little if the valve doesn't seal completely.
  • Cube_
    Cube_ Member Posts: 5
    Update: I rotated the square plate as much as I can and the heat has decreased. Thanks all for the tips
  • Steamhead
    Steamhead Member Posts: 16,730
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
  • Cube_
    Cube_ Member Posts: 5
    Steamhead said:
    Wow, accurate find. Thats exactly how the knob and valve look on the others