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  1. macvalsa

    Copper alloy for breathing Oxygen

    Depends a little on the pressure but in gas service generally you can use bronze to BS LG2 or AS 1565 I think the ASTM code might be B62 Do not forget if its a medical breathing application it must be cleaned to medical gas levels
  2. macvalsa

    Water velocity Calculation

    Thanks DonyWane, This has allowed me to calculate the "K" factors successfully. in the formula h = kV^2/2g h is the frictional head loss due to the resistance (k) so we can calculate what the head loss created by the restriction will be (in our case a valve) In our case we are...
  3. macvalsa

    Water velocity Calculation

    Gentleman and Others, A bit of assistance if you dont mind. I have ordered Crane 410 but expect it will be several days befor i receive it. In the interim i would like to calculate some water velocities caused by installing a valve. Each valve type and manufacturer quantify the flow through...
  4. macvalsa

    Butterfly Valve for Seawater Material

    If the valve disc is uncoated it should be made from a seawater compatible material. Do not use stainless of any grade as it is very suspect to chloride pitting corrosion.(this is not true of super-duplex) LG2 bronze is acceptable but a much better option would be a cupro-nickel alloy like...
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