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Alternative TRV

Max Frister
Max Frister Member Posts: 6
in THE MAIN WALL
On my current job, we are going to be installing some rehab'ed old cast iron radiators. Unfortunately, standard TRVs like Danfoss clash stylistically with the old rads -- sort of like modern Scandinavian furniture in an old house. There seems to be some nice looking old-style TRVs in the UK (http://www.perfect-irony.com/accessories.html, http://www.tuscanfoundry.co.uk/products.asp?subcat=187). Does anyone know who makes them and how well they work? Are they distributed in North America?

It occurred to me that an a nice alternative would be a proportional zone valve (that is one that would open and close partially rather than all on or all off). Does anyone make such a valve?

- Max

Comments

  • Mike T., Swampeast MO
    Mike T., Swampeast MO Member Posts: 6,928


    I have a feeling that they use straight threads. My one experience with such (Myson) was not pretty!

    Plumbers in the U.K. make upwards of $150,000/yr. I think this helps pay for their psychiatric services (or liquor/beer) required by working with straight threads.

    Write them if you're curious--I'm sure they will reply.

    p.s. Found VERY nice, traditional looking, VERY expensive air vents there, BUT the smallest size was 1/2"!!!
  • Art Pittaway
    Art Pittaway Member Posts: 230
    Check Erie Zone valves

    www.invensysibs.com/erie
    We make all sorts of controls and actuator types and sizes, including proportional. Hide the zone valve and have just pipe going to the radiator.
  • Paul Pollets_2
    Paul Pollets_2 Member Posts: 63
    TRV's

    Oventrop makes TRV heads in different colors that are available in the US. I've used the black heads on many projects. The valve bodies are all nickel plated these days, but sandblasting the nickel leaves the brass. I would not recommend a zone valve on a cast iron radiator...it's not designed for proportional flow and would be non-adjustable. The TRV's in metric threads can be installed on US threads using Rorke's Rule. Try Blueline Supply (Jackson Hole, WY. for the details (307) 733-3953 ask for Chris or Don.

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  • Unknown
    Unknown Member
    I have used them on Iron Radiation

    1200 of them at a college, both vapor (steam) and hot water.

    They are a match made in heaven. I strongly endorse their use on iron.

    Noel
  • Max Frister
    Max Frister Member Posts: 6
    Oventrop

    I'll check out the oventrop black trv's. Paul: what is Rourke's rule? It looks like oventrop makes 3/4" and 1/2" TRV bodies. Noel: Did you mean that you used TRV's in general or Oventrop in particular?

    -- Max
  • Unknown
    Unknown Member
    In general

    I've used Macon, Honeywell/Braukmann, Danfoss, Tour & Andersen, and Taco. All are good, some are ruggeder than others in the itty bitty plastic parts department.

    Noel
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