Zone Valve, OK to use?

john_20

I'd liked to change my "diverter-tee" hot water system from one to two zones using zone valves and a single circulator. Is is okay to use standard zone valves (Honeywell V8043E1020) or do I need a "full port" valve. I'm concered that flow rate through a standard valve will be restricted but am unsure if that will affect heating performance; the opening in the valve is so small compare to the inlet pipe! The main loop in the basement is 1" with 1/2" supplying the radiators to the first and second floors; I'm splitting each floor into its own zone. Any advice would be great! Thanks.

Alan(CaliforniaRadiant)Forbes

Find the

zone valve with the highest Cv rating you can find; I think the Honeywell's we used to use were around 7.0.

Alan

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techheat_2

Where

were you planning to install zone valves on a monoflo system? Don't see how this can be done. Am I missing something?

Mark J Strawcutter

trade-off

Their 1in zone valves come in 3.5 and 8Cv variants. However the trade-off is that the 3.5Cv one will shut off against 20psi while the 8Cv one only against 8psi.

Mark

Boilerpro_3

Highest CV is probably on White Rodgers

The valve pressure drop is usually equal to about 7 to 10 feet of pipe of the valve size. Basically it is a full port ball valve. I use them whenever I need high flows at low pressure drops.


Boilerpro