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Doyle 2A vacuum valve

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Doester
Doester Member Posts: 17
in Strictly Steam
Is there any difference between a “vacuum valve” and a regular air vent? I was going to replace this with a Hoffman 1A so I could slow it down. Single pipe steam system.
Thanks!!!

Comments

  • Danny Scully
    Danny Scully Member Posts: 1,462
    There is a difference @Doester. Vacuum vents had check valves that enabled the system to go into vacuum after the air had been vented. I say HAD because they don’t make vacuum vents for radiators anymore. So, the Hoffman 1a would be fine.
    Doester
  • Doester
    Doester Member Posts: 17
    Thank you!!!
  • Steamhead
    Steamhead Member Posts: 17,886
    Do the rest of your radiators have vacuum vents? How about the vents at the ends of the steam mains?
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
  • Doester
    Doester Member Posts: 17
    No, only 2 vacuum vents out of 16 radiators. And the main vents were “Hoffman float quick air vents”. I’ve replaced them with bigmouths. Thanks!

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