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2 pipe Steam

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Do I leave this kidney shaped air vent? On this 2 pipe steam trapped system I have to replace the boiler and I am thinking it is here for a reason but the guy who installed it is dead!

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  • Danny Scully
    Danny Scully Member Posts: 1,426
    edited September 2017
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    This is going to sound harsh Jim, but if you don't know what that is, you probably shouldn't be replacing the boiler. You are correct, however, it is there for a reason. Do you have a copy of the Lost Art?
    ChrisJKC_Jones
  • ChrisJ
    ChrisJ Member Posts: 15,768
    edited September 2017
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    I've got a feeling this isn't going to end well for the system.

    What are your plans for the rest of the piping? What size boiler are you using?

    @Steamhead
    Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment
    JohnNY
  • JUGHNE
    JUGHNE Member Posts: 11,074
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    This is something different......vapor/vacuum etc....someone here will probably tell you.

    How has it been working with the existing piping (not good BTY) on the boiler?

    The old boiler must be leaking?
  • New England SteamWorks
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    It's a Dunham 2203 Air Eliminator. I think it looks like a heart, so when I rebuild them I paint them red. Rebuilding one this very afternoon. It stays.






    New England SteamWorks
    Service, Installation, & Restoration of Steam Heating Systems
    newenglandsteamworks.com
    JohnNYRomanGK_26986764589Sailah
  • Steamhead
    Steamhead Member Posts: 16,888
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    What @New England SteamWorks said.

    In this system, the radiators do not have air vents on them. Air exits the radiators through the traps, travels through the dry (overhead) returns and goes out through that vent. Without the vent, the system won't heat well, if it heats at all. There should also be radiator traps piped between the ends of the steam mains and the dry returns. These route the air from the steam mains quickly into the dry returns and out the vent. If these are leaking or stuck shut, the system won't heat well.

    And I hope you're not going to re-use the existing steam piping around the boiler. It was wrong from the get-go. What boiler are you going to install?
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
    KC_Jones
  • Gordo
    Gordo Member Posts: 857
    edited September 2017
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    This is a video of Warren Webster's smaller version of the Dunham air eliminator.
    https://www.youtube.com/watch?v=YO7_65-uWzw
    All Steamed Up, Inc.
    "Reducing our country's energy consumption, one system at a time"
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Baltimore, MD (USA) and consulting anywhere.
    https://heatinghelp.com/find-a-contractor/detail/all-steamed-up-inc
    New England SteamWorks
  • JohnNY
    JohnNY Member Posts: 3,231
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    @Gordo, do you think that can be replaced with some creative piping terminating to a Hoffman 79? It seems like the functions are similar.
    Contact John "JohnNY" Cataneo, NYC Master Plumber, Lic 1784
    Consulting & Troubleshooting
    Heating in NYC or NJ.
    Classes
  • Steamhead
    Steamhead Member Posts: 16,888
    edited September 2017
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    JohnNY said:

    @Gordo, do you think that can be replaced with some creative piping terminating to a Hoffman 79? It seems like the functions are similar.

    Hoffman #79? That's a hot-water vent:

    http://bellgossett.com/steam-specialties/water-vents-model-77-78-79/

    You need a vent that can close against steam if, for example, a trap fails open and fills the dry return with steam.

    One Gorton #2 is the minimum here. The only vents Hoffman ever made that were big enough for a system like this were the #10 non-vacuum and #11 vacuum vents, and those went out of production sometime around 1930.

    Since this is on a "B" dimension rather than an "A" dimension, I would not use a Big Mouth. You need a vent with a float so the vent won't discharge water if the pressure gets too high.
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
  • New England SteamWorks
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    Beating once again.


    New England SteamWorks
    Service, Installation, & Restoration of Steam Heating Systems
    newenglandsteamworks.com
    GordoCanucker