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Two-pipe Steam Valve replacement

Keith B Carpenter_2
Keith B Carpenter_2 Member Posts: 4
in THE MAIN WALL
I have a customer with a two pipe steam system ( i would consider it a vapor system) that we need to start replacing Radiator valves. the existing valves are packless and have a lever handle for control. Question #1 Can we replace with normal Steam Rad. valves w/ packing nut? Question #2 can we install Thermostatic Radiator Valves on this type system?

Comments

  • Dale
    Dale Member Posts: 1,317
    One of the many

    One of the considerations I would research is sizing of the mains ect. If you turn this into a standard system will the current sizes work? Did the system ever have a vacuum pump? You'll probably be fine but a check of pipe sizes pretending you have a 2 psi system may save you a headache.
  • DanHolohan
    DanHolohan Member, Moderator, Administrator Posts: 16,601
    Sounds like

    one of the vapor/vacuum systems where vacuum formed naturally as the steam condensed. This was a great thing during the coal-era but really not necessary nowadays. Yes, you can use standard supply valves or TRVs. Are there traps on the outlets of the radiators?
    Retired and loving it.
  • Keith B Carpenter_2
    Keith B Carpenter_2 Member Posts: 4
    two pipe steam

    The system does have traps on the radiators. We replaced the boiler a couple of years ago at that time we installed a vaporstat (thats what was there before) and we have it turned way down (wish we could find a more accurate pressure gauge to see what pressure the system is operating at)I do believe the system pressure go down below atmospheric . When we replaced the boiler after consulting on this forum and reading Dan's book's we elavated the new boiler to match the water line with the old boiler it works great!

    I really appreciate all the help and comments
  • Keith B Carpenter_2
    Keith B Carpenter_2 Member Posts: 4
    two pipe steam

    The system does have traps on the radiators. We replaced the boiler a couple of years ago at that time we installed a vaporstat (thats what was there before) and we have it turned way down (wish we could find a more accurate pressure gauge to see what pressure the system is operating at)I do believe the system pressure go down below atmospheric . When we replaced the boiler after consulting on this forum and reading Dan's book's we elavated the new boiler to match the water line with the old boiler it works great!

    I really appreciate all the help and comments
This discussion has been closed.

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