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Odd gas valve

rcnhoward
rcnhoward Member Posts: 2
edited October 2023 in Strictly Steam
Anyone ever seen a gas valve like this?

Comments

  • mattmia2
    mattmia2 Member Posts: 11,073
    Is that both gas or oil? Looks like an oil pump on top of a gas valve.
  • retiredguy
    retiredguy Member Posts: 985
    edited October 2023
    That is a pneumatic gas pressure regulator that came on a North American gas burner. They came on mostly larger burners firing about 12,000,000 BTU's and above. At one time, North American burners and fire tube boilers were one of the best made, IMO.

    They usually came on the most expensive North American Boiler systems. I only saw and serviced a few of these during my 40+ years.
    Intplm.rcnhoward
  • mattmia2
    mattmia2 Member Posts: 11,073
    Oh, so it is like a large version of the gas valve on a mod con.
  • rcnhoward
    rcnhoward Member Posts: 2
    Retired guy, thanks for the response, first time in 35 years I have ever seen one.
  • retiredguy
    retiredguy Member Posts: 985
    edited October 2023
    @mattmia2` I know nothing about a mod con since I have never seen one. We did very little residential, just schools, hospitals and industrial boilers. They were a modulating gas valve.
    mattmia2
  • mattmia2
    mattmia2 Member Posts: 11,073
    edited October 2023
    Mod con gas valves usually modulate based on the amount of air pulled through them, the control just controls the inducer fan speed and the gas valve follows.

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