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Erie 2 way zone valves

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Steve_210
Steve_210 Member Posts: 646
in THE MAIN WALL
Having some noise problems with Erie 2 way zone valves. Pretty sure it is velocity noise.  When I remove the head (actuator) noise stops completely, but when you put back the head the noise starts again.

Also could anyone tell me what 2 port zone valve has the highest CV value.

Any advise greatly appreciated.

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  • Steve_210
    Steve_210 Member Posts: 646
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    white rodgers

    do one with cv of 23.5.

    We normally use honeywell. has anyone had a good track record with W R or other other manufactures.
  • Alan (California Radiant) Forbes
    Alan (California Radiant) Forbes Member Posts: 4,011
    edited April 2011
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    Removal of the operator

    should not impact noise or flow.  Is it a Pop-Top style?



    After many trials and failures, I've settled on Danfoss as my favorite zone valve since we've had no failures or issues.



    Cv's are lower, but they've never been a problem.



    http://na.heating.danfoss.com/PCMPDF/Zone%20Valves_Brochure.pdf
    8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

    Two btu per sq ft for degree difference for a slab
  • Steve_210
    Steve_210 Member Posts: 646
    edited April 2011
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    thanks alan

    i spoke to Erie, They said that because it is a paddle type zone valve, removing the operater allows the paddle to open more thus reducing the velocity noise

    I am looking for a zone valve with a high CV but am cautious about using a

    new brand,  what do others Like?
  • Alan (California Radiant) Forbes
    Alan (California Radiant) Forbes Member Posts: 4,011
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    Why?

    Just curious:  why do you need such a high Cv?  Is it common to flow more than 2-3 gpm per zone?  
    8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

    Two btu per sq ft for degree difference for a slab
  • Steve_210
    Steve_210 Member Posts: 646
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    it is

    an apartment building, I have no control over the boiler room. differential by pass may be another option.
  • Steve_210
    Steve_210 Member Posts: 646
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    Bump

    Any coments
  • hot_rod
    hot_rod Member Posts: 22,158
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    Knowing the flow rate

    would be a big plus in selecting a valve. A pressure activated bypass or a delta p circulator are a few other fixes.



    Th higher the Cv the less shut off pressure of the valve, generally. So a larger orfice valve may solve one problem but create another depending on the delta p that circulator creates.



    Pull the spec sheet on various valves to see the difference. Look at close off pressure, operating temperature, type of construction, etc to find the best valve for your application.



    Here is a spec sheet on two different brands to compare features.



    If you do suspect excessive flow, address that. The valve you have will work fine if you install a PAB or smart pump.



    hr
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
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