Flow, Swing, & Spring Check Valves

Post in 'The Boiler Room - Wood Boilers and Furnaces' started by SIERRADMAX, Dec 19, 2012.

  1. SIERRADMAX

    SIERRADMAX
    Expand Collapse
    Feeling the Heat

    Joined:
    Jan 13, 2011
    Messages:
    299
    Likes Received:
    25
    Loc:
    RI
    I somewhat understand what their intended uses are. But when & where are they to be installed?

    Am I correct in that flow (weighted) & swing check valves are only to be installed in a horizontal position and a spring check valve can be installed in any orinetation?

    I'm trying to decide what valve(s) to install in the supply manifolds of two boilers plumbed parrallel to prevent water circulation from one to the other. I know swings are out but why not a spring? They're 1/3 the cost of flow checks.....
     
    Collapse Signature Expand Signature

    Helpful Sponsor Ads!





  2. mikefrommaine

    mikefrommaine
    Expand Collapse
    Guest

    I don't know if a spring check would work or not. I used a taco weighted flo - check on my system. It worked as designed and kept the wood boiler piping cold when the oil was running.

    I actually just took it out because I'm adding storage and using a zone valve instead. Its 1.5" and Id sell it for 25 plus shipping if you can use it. It was in use for a year.

    http://www.pexsupply.com/Taco-222-6-1-1-2-Universal-CI-Taco-Flo-Chek-1993000-p
     
  3. Bob Rohr

    Bob Rohr
    Expand Collapse
    Minister of Fire

    Joined:
    Jan 9, 2008
    Messages:
    1,000
    Likes Received:
    153
    Loc:
    SW Missouri

    Correct a weighted check needs to be installed so the weight can work :)

    The advantage to a spring check is can be installed any position. They usually have a better sealinbg surface for tight close off. Also the spring checks designed for hydronics have a cone shaped design and a soft seat so they don't clatter, if that's a word. The cone shaped disc offer a smoother flow pattern then a flat disc check used for sump pumps.

    Neoperl makes the checks that are found in most circ pumps these days, and many other hydronic components, they have a 1/2 psi 'pop" to them and work well with small, low flow circs.

    Check the Cv, if you oversize a check the valve can flutter if you do not have enough GPM to hold it fully open. Often times a check one or two sized smaller then the pipe is sufficient. Check the temperature rating also.
     
  4. maple1

    maple1
    Expand Collapse
    Minister of Fire

    Joined:
    Sep 15, 2011
    Messages:
    6,207
    Likes Received:
    1,068
    Loc:
    Nova Scotia
    I used simple swing checks in mine to do that. No issues so far.
     
    Collapse Signature Expand Signature
  5. SIERRADMAX

    SIERRADMAX
    Expand Collapse
    Feeling the Heat

    Joined:
    Jan 13, 2011
    Messages:
    299
    Likes Received:
    25
    Loc:
    RI
    Sounds like flow checks are the preferred at each boiler manifold. Besides, I'm having difficulty locating a swing check with a greater than 180 degF rating.

    On another note, I have a 1-1/4" spring check sitting on the bench. Looking to use this in lieu of the P.A.B. in my diagram. Any thoughts?
     

    Attached Files:

    Collapse Signature Expand Signature

Share This Page

Entire Site copyright © 1995-2016 - email to webinfo@hearth.com
Hearth.com and HearthNet are property and trademarks of Hearth.com LLC Advertising Information