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Pounds or Ounces

lbud
lbud Member Posts: 3
in Strictly Steam
I'm working on a system that has had a boiler replaced and I think that the installer used the wrong control. Attached is a picture of one of the valves and the device that is on the end of the return line. The return piping from the radiators is 1/2" pipe with standard elbow fittings.

Can anyone tell me if this system is designed for ounces of steam.

Problem is that the radiator valves are leaking when the steam pressure rises.

Comments

  • Gordo
    Gordo Member Posts: 857
    Short Answer to Your Question:

    Ounces. 
    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
  • Jamie Hall
    Jamie Hall Member Posts: 24,878
    longer answer

    and only a few -- like six -- ounces at that.
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • nicholas bonham-carter
    nicholas bonham-carter Member Posts: 8,578
    edited March 2011
    ny vapor system

    definitely ounces, so a 16 oz vaporstat will be needed, along with our favorite gauge [gaugestore.com 0-15 ounce]. keep the useless 0-30 psi gauge on the boiler, as it is required by code.

    the device on the end of the return must be a main vent of some sort, and it may well not work at pressures more than 6 oz. does it seem to work before the pressure gets up there? it may contain a check valve within to maintain a vacuum. that may have to be defeated so that the vacuum can be relieved.--nbc
  • Steve_175
    Steve_175 Member Posts: 238
    Main Vent

    Looks like a Hoffman 75 behind that thing. It is painted green.
  • Steamhead
    Steamhead Member Posts: 17,387
    edited March 2011
    That's a "Thermal" System

    note the TS emblem on the side of the valve. It's an Orifice-type Vapor system. You need a Vaporstat as this beauty runs on ounces.



    Right now we have two Thermal threads running- where is this one located?
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
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