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Caleffi Zone Valves

Alan (California Radiant) Forbes
Alan (California Radiant) Forbes Member Posts: 4,547
in THE MAIN WALL

I like the new o-ring seals vs. fiber washers.

IMG_3640.jpeg IMG_3642.jpeg
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
HydronicMikeGGrossmattmia2Intplm.

Comments

  • HydronicMike
    HydronicMike Member Posts: 123

    Pretty much everything is o rings now-boiler feed/bfp, mixing valves, etc.

  • mattmia2
    mattmia2 Member Posts: 14,125

    i hate those fiber gaskets, i especially hated them when i had to cut one out of sheet gasket because i had to break the union and couldn't get the old one to seal and I didn't have a spare.

    GGross
  • GroundUp
    GroundUp Member Posts: 2,416
    https://forum.heatinghelp.com/discussion/comment/1859977#Comment_1859977

    Wait until you have to make your own o-ring. You'll miss the fiber gasket

    mattmia2
  • mattmia2
    mattmia2 Member Posts: 14,125

    that is where the majority of the telflon tape that i buy goes.

    9326yssh
  • RascalOrnery
    RascalOrnery Member Posts: 97

    Does any supplier make a multi zone manifold like block? Or is every zone valve sold as individual?

  • The Steam Whisperer
    The Steam Whisperer Member Posts: 1,304

    I've got some Calleffi's running low pressure steam and have been quite reliable ( they make a higher temperature rated valve than the standard hot water models). Much more reliable than the outrageously priced multi piece commercial Honeywell zone valves on the same system that now, after being repaired twice over the same number of years, are getting replaced (with Johnson controls valves, Calleffi's can't handle larger steam loads).

    To learn more about this professional, click here to visit their ad in Find A Contractor.
  • hot_rod
    hot_rod Member Posts: 25,648

    you can assemble an o ring kit for spares. Spare o ring part numbers are in the catalog

    This kit, 12 o rings covers everything from 1/2- 2”

    IMG_0630.jpeg
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
    PC7060

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