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
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...
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...
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...