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slow closing valve

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billygoat22
billygoat22 Member Posts: 124
in THE MAIN WALL
I have a customer that system has developed slamming noise/ waterhammer. when more than one zone is calling and one closes, gets a banging.

if I slow the rate of closing on zone valves by easing on shut, (honeywell 8043) do not get slamming. If one zone running, no noise when closes, since pump shuts off as it closes.

waould like to know if I can retrofit a slow closing valve motor in place of the existing motor to stop the waterhammer? thanks.

Comments

  • Paul48
    Paul48 Member Posts: 4,469
    Zone valve backwards?
  • hot_rod
    hot_rod Member Posts: 26,548
    Often that hammer is caused by too much pump. Or the valve is in backwards

    If it's possible. Delta P circ is a nice fix, and it reduces power consumption
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • billygoat22
    billygoat22 Member Posts: 124
    valves in right, 1st thing I checked. only one pump for system. has 4- 3/4" lines, one of which is domestic hot water. other three are series loop basebd circuits for each floor.
  • TomS
    TomS Member Posts: 66
    Simple fix. Remove the cover on the zone valve and you will see two springs. Unhook one end of the spring that is easily assessable with fine needle nose pliers. This will allow the valve to close slowly.
  • Dave H_2
    Dave H_2 Member Posts: 621
    If it just "developed", what changed? Was it always there?
    What type of circulator is installed?

    More often than not, it could be just the application and choosing the correct circ for the project. Variable speed circs can and will help, but without knowing what changed, you just dont want to throw money at it and hope that is fixes it.
    I always want to know exactly whats wrong/changed/ so that it fixes it the first time.

    Dave

    Dave Holdorf

    Technical Training Manager - East

    Taco, Inc

  • vtan
    vtan Member Posts: 10

    I have the exact issue. Curious if a solution was implemented. Please share.

  • psb75
    psb75 Member Posts: 1,099

    Um…the original posting was…TEN years ago! It of course is always exceedingly helpful when the original poster follows up with a resolution especially if it is a tradesperson. There are however quite a few basic and helpful suggestions in this thread, including one from a product technical advisor. Vtan, you can NOW "pick up the thread" again where it was "dropped"….ten years ago and provide your OWN report of how you addressed the problem. Just sayin'….

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