To get email notification when someone adds to a thread you're following, click on the star in the thread's header and it will turn yellow; click again to turn it off. To edit your profile, click on the gear.
The Wall has a powerful search engine that will go all the way back to 2002. Use "quotation marks" around multiple-word searches. RIGHT-CLICK on the results and choose Open Link In New Window so you'll be able to get back to your results. Happy searching!
In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.

Check valves on top

JohnWayneJohnWayne Posts: 18Member
Any ideas as to why someone would pipe to check valves into the top of a steam boiler like this?  When I asked a guy at this site he replied that it was a vacuum breaker.  Doesn't seem right or necessary to me.  Any thoughts?  The ball valve stays open throughout operation and they said steam doesn't come out.  I was actually there to check something else but noticed this.  When I asked why it was there they replied because they boiler works so we don't touch it.    Thanks, Mike.
jpg
jpg
checkvalve.jpg
0B
· ·

Comments

  • SteamheadSteamhead Posts: 8,892Member ✭✭✭
    It's a vacuum breaker

    if that system has zone valves and a boiler-feed pump, the vac breaker is needed so the boiler won't go into vacuum when it shuts off and suck water out of the tank. This would flood the boiler. 
    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.
    · ·
  • JohnWayneJohnWayne Posts: 18Member
    thanks

    Thanks for the info.  I've asked around and the best I can get is that we are only there to maintain that single boiler.  Our company installed it in 2000.  We don't actually take care of anything in the building so nobody seems to know what the whole system looks like.  The only clue I did find in the boiler room was a Trane Tracer panel.  Unless the building is loaded with AHUs that might point to zone valves. 

    Next question would be wouldn't it have been better to put a vacuum breaker on instead of a double check valve set up?
    · ·
This discussion has been closed.

Welcome

It looks like you're new here. If you want to get involved, click one of these buttons!