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Steam to hot water radiator conversion valves

bob eckbob eck Member Posts: 563
Hi I have a steam boiler job that is being converted to a hot water boiler job. I know oventrop makes a valve for this type job. Does anyone else make one?


  • You talking

    thermostatic radiator valves?  Try Danfoss.

    I'd like to hear more about your steam to hot water conversion. 

    - Has the system been pressure tested for leaks?

    - Are there room-by-room heat loss calculations and radiator output numbers to see how the radiators will perform?

    I'm just curious because I've been tempted many times to do the same thing.

    Often wrong, never in doubt.
  • SWEISWEI Member Posts: 7,356
    edited June 2013
    This might well be the Oventrop

    But someone here linked to it awhile back and I saved the PDF
  • SteamheadSteamhead Member Posts: 11,378
    " Has the system been pressure tested for leaks?"

    " Are there room-by-room heat loss calculations and radiator output numbers to see how the radiators will perform"

    If not, I hope Bob has a good lawyer. I've seen too many messed-up conversions.
    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.
  • nicholas bonham-carternicholas bonham-carter Member Posts: 6,540
    Good lawyer-or good contract?

    In this case the contract of installation would be the most important. The problems of leaks may not show up right away, but a few years down the road. Therefore the installation contract should specify the length of warantee, so thet a leak in 2 years is not covered, either for it's repair, or it's damage.

    This should not be in the fine print, but an up front clause, to prevent annoying calls from the customer,or his insurance co.

    A pressure test would be a good idea in this case, to pinpoint any weak spots in the piping.--NBC
  • bob eckbob eck Member Posts: 563
    Steam to hot water

    Hi thanks for the input. I am a P&H wholesaler salesman and I have a customer doing this steam to hot water conversion job. It is a church job. We will do a heat loss. He will be removing all old black steel piping and he does water test the old cast iron radiators and the radiators will be flushed out before water system is piped in. He will also be installing a dirt separator on the system. He is telling the church if they want to do this conversion and the old radiators end up leaking down the road he is nor responsible for that. The church is the one who wants to convert steam to water. Any other input is helpful.
  • RobGRobG Member Posts: 1,850

    In Steamheads words, the system has probably been "knuckleheaded" and the church has banging during their services. It would be cheaper for the church to find a new repair guy than to replace the system.

  • SWEISWEI Member Posts: 7,356
    other input

    clean, flush, repeat.  Repeat again after a month or so.  Rhomar 9100/9250 works well.  Treat the fill water after that.

    Check back in a year and be prepared to flush again.  Re-treat.

    Caleffi Dirtmag was made for this.
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