Weighted flow check valves

[SteveJ]

The two attachments are from STSS.

Questions

1. Is anyone using a setup with weighted flowcheck valves as in the diagram?

2. Will this layout work as well as nofossil's zone valve and pump configuration http://www.nofossil.org/heating.html for charging and removing heat from storage?

Thanks,
Steve

 

[Nofossil]

My first take, after only one cup of coffee:

I don't understand the function of the pair of check valves above the left end of the STSS. A pair of check valves in parallel (if that's what is shown) is just a piece of pipe.

C-1 and ZV-1 seem redundant when heating with wood.

It would be hard to control the amount of heat going to storage unless C-1 is a variable speed circulator.

Not to suggest that I have the best of all possible configurations, but what if you installed C-1 and ZV-1 in parallel in the spot where you have the two opposing check valves? You would open ZV-1 when the wood boiler was running and you had extra heat that you needed to put into storage. You would turn on C-1 when you wanted to withdraw heat from storage. In this scenario, C-1 and the circ on the wood boiler would need check valves as well, either in series or integral. My experience with swing valves in this application has been less than euphoric. I've switched to using circs with integral check valves.