To get email notification when someone adds to a thread you're following, click on the star in the thread's header and it will turn yellow; click again to turn it off. To edit your profile, click on the gear.
The Wall has a powerful search engine that will go all the way back to 2002. Use "quotation marks" around multiple-word searches. RIGHT-CLICK on the results and choose Open Link In New Window so you'll be able to get back to your results. Happy searching!
In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
Three port thermostatic mixiing valves
When you look up the Cv of a three port TMV, is the pressure drop and flow based on flow from one inlet to the outlet or both inlets to the outlet, or does it not really matter. I am thinking about the circuit where a TMV is used for boiler protection - the biggest pressure drop is likely to be across the TMV, but I can't get my head around if it makes a difference if one or both ports are open?
Also, we use metrics in NZ but most Cv's I have seen are based on imperial measures - are there conversion factors to convert Cv's or do you just have to develop your own?