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Dielectric coupling for higher temp

I have steel pipe and a brass valve in a 240 deg medium temp system. The highest rated dielectric coupling I can find is 230 deg. Any one no of a dielectric coupling with a higher temp rating? Can an arguement be made that I don't need it?


  • Peter Turk
    Peter Turk Member Posts: 10
    You don't need dielectic couplings for bronze to black steel

    The highest temp rating I have seen for dielectric is also 230 F.

    But pending on the alloy of the valve, you don't need dielectric protection. Brass/bronze is an alloy and does not react at the same rate as pure copper. Typically you do not need dielectric protection for a bronze alloy on black steel like you would need for copper to black steel.
  • Alan (California Radiant) Forbes
    If it's

    a closed system, you don't need dielectric protection.  Without oxygen in the water, there's no place for electrons to go. 
    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
This discussion has been closed.