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Telestat

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Does anyone know of a replacement for this actuator? It's threaded on to the manifold.

Thanks in advance.


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

Comments

  • hot_rod
    hot_rod Member Posts: 22,476
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    Do you know what brand manifold? Threads are usually all the same from brand to brand, but the pin stroke doesn't always match.

    It looks like a brand that Watts radiant bused once?
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • Alan (California Radiant) Forbes
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    Good point. I'm going by there later today and will check the manufacturer.
    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
  • CWHudson
    CWHudson Member Posts: 2
    edited April 2021
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    Old 2017 thread but I have identical Telestat to your picture. Valve body is Heimeier/MNG/Oventrop with M30X1.5mm threads. I found a cross-reference to Braukmann MV100S8011... problem, that is obsolete too. My 2nd floor is a single pump feeding 4 bedrooms each with a Telestat. How did you solve your problem. Appreciate the help...
  • _HeaterDude_
    _HeaterDude_ Member Posts: 15
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    I am looking to replace 45 of those same actuators on Watts manifolds.....
  • STEVEusaPA
    STEVEusaPA Member Posts: 6,505
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    I am looking to replace 45 of those same actuators on Watts manifolds.....

    @Alan (California Radiant) Forbes you may want to get yours first before @heaterdude buys them all up LOL.

    There was an error rendering this rich post.

  • Alan (California Radiant) Forbes
    Alan (California Radiant) Forbes Member Posts: 4,105
    edited May 2023
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    Y'know, I remember replacing those actuators, but I forgot which ones I used.

    I would call Watts as they would (should) know.

    And it would be great if you let us know what you figure out.
    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
  • hot_rod
    hot_rod Member Posts: 22,476
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    I guess it might depend on the vintage of the manifold. Geptuft was one of the stainless manifold manufacturers that Watts used. This one is probably late 90's into the 2000s. Maybe they still use this brand?

    The Caleffi TwisTop seems to work fine. It opens and closes completely. It's the pin stroke that is important so the valve moves the correct amount.

    The uniquely designed Caleffi pex fittings seal also. This pex adapter has a tapered flow path for excellent flow.
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream