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carr's positive circulating radiators - Can I convert to water?

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nickDC
nickDC Member Posts: 2
All I pulled this out a house we're renovating - the owner was going to trash. I have a hydronic system in my house but I have never seen this radiator before. Can I convert to water? It is beautiful I have one column and two others.

Nick



WMno57STEVEusaPASuperTechkcopp

Comments

  • JUGHNE
    JUGHNE Member Posts: 11,077
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    If only one pipe connection probably not working with water.
    But I am sure someone here would want them....priceless!
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 15,629
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    @nickDC

    I bet you could find a place on the top header to drill and tap a 1/2" pipe thread. I would do it on the opposite side of the existing tapping at the top
    STEVEusaPA
  • hot_rod
    hot_rod Member Posts: 22,262
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    This type of valve works well on one pipe radiators. I have played around with one on several different radiators in my shop. Adding a small 1/8" auto vent vent up high assures you get the most amount of water into the radiator. They will heat without being 100% filled.
    Air space gets you a false expansion tank in the system.

    https://www.caleffi.com/sites/default/files/file/01051_en.pdf

    The Caleffi is not sold in the US, but I believe Oventrop has them available in the US.
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • nickDC
    nickDC Member Posts: 2
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    hot_rod - thanks that is a great solution. I'm attaching more pics of the opposite side and the other two radiators



    . It looks like another place where if I could undo the plug I could put a return valve. The one thing I am wondering - From the pdf of the 1874 tech specs - is that a water seal below thats locks the steam in the upper tubing until it turns back to water. And it would just act like one big chamber even if filled?
  • Steamhead
    Steamhead Member Posts: 16,901
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    I don't think these will work on hot-water, even with those Oventrop valves. But please salvage them, they are classics!!!!!
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
  • hot_rod
    hot_rod Member Posts: 22,262
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    nickDC said:
    hot_rod - thanks that is a great solution. I'm attaching more pics of the opposite side and the other two radiators . It looks like another place where if I could undo the plug I could put a return valve. The one thing I am wondering - From the pdf of the 1874 tech specs - is that a water seal below thats locks the steam in the upper tubing until it turns back to water. And it would just act like one big chamber even if filled?
    It would be worth trying one with a conversion valve 
    Do you have a source of hot water? A small electric water heater and a circulator would work

    They would need to be able to hold pressure also.

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • JUGHNE
    JUGHNE Member Posts: 11,077
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    There was a simple single 3/4" insert double pipe valve that would go into a WH tank drain valve opening for the desuperheater from WTA geo heat pumps.

    Long 1/2" od tube to the inside and 1/2" od on the shell of the valve.
    Constant flow from the HP until hi temp reached. No adjustments.
  • DanHolohan
    DanHolohan Member, Moderator, Administrator Posts: 16,547
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    I don’t think those tubes are connected at the top. They probable have an internal baffles to allow steam and air to pass each other. I’ve never seen these converted to water. 
    Retired and loving it.
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 15,629
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    Since the vertical pipes are threaded on both ends I would think one end must be a LH thread???
  • JUGHNE
    JUGHNE Member Posts: 11,077
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    In the 1890 St Louis house posting, there is a picture of a round table top rad with 2 pipes connected and an air vent.
    May not be the same at all.