Flow Control Question

Steve_45

I’m installing a new boiler hydronic system in my house. I’ll be using a Primary/secondary setup. My question is: If I am using four Taco 007-IFC
circulators(four zones- two upstairs and two for downstairs) on the secondary feed sides and I have four B&G little red straight-angle pattern flo control valves(3/4”). Can I put these flo-valves on the return side(of each secondary) coming back into the primary loop? If so, which way should the arrow point? Toward the return tee going
back into the primary or toward the baseboard heaters.

Thanks,
Steve

clammy

flow chks

steve you could take your pumps off the bottom of your primary loop and pipe a thermal trap by looping the supply and return pipe down and go back up at least 24 inches it saves you the use of a flow chk on the returns if not try a good spring chk on the return .You are going to be cutting in 4 sets of tees for your pumps correct 2 for each zone i've found i like the thermal trap to stop migrating heat better then flow chs on supply ande return weigh in all your opitains before you start piping is this your first p/s system good luck and peace

Ken_8

Flo-checks

are typically placed on the hotter water point of a loop. This implies nearest the boiler supply point(s)- where the water temperature would be hottest (and therefore more bouyant). However, simple swing checks are more commonly used in P/S layouts, and must be placed between the discharge of the boiler pump - and the closely spaced tees where the boiler pipes attach to the trunk.

In your description however, you appear to be using P/S in an unusual manner. If each zone is individually pumped, what need is there for P/S? Are you mixing lo-temp apps. with hi? If it's a straight HWBB application, P/S only complicates the design. If somthing is missed, the one answer to another question is - always put the flo control valve with the arrow pointing away from the circualor discharge side. Doing the reverse would dead-head the circulator/pump.

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Steve_45

I know that they are typically placed on the hotter water side, and that usually a spring check would be used, but
I already have these flo control valves and was wondering if
I could use them in the way I'm asking. I know that I don't
have to do a Primary/Seconday setup now, but I'm looking down the road if we decide to put in some radiant heat later. If I never do, will the P/S method be a disadvange
to me.

Thanks,
Steve

Steve_45

Yes it is clammy. I know I don't need P/S but I'm
looking ahead. (See above reply)

Mark_24

Flo conm

In reading the first entry, "I have four B&G little red straight-angle pattern flo control valves(3/4”)"... what EXACTLY do those red B&G flo control valves do? I have one that has two inlets and one outlet. One of these inlets are capped off.

Radiant Wizard

Why do you need

Flo Checks? The IFC already has a check built into it.

Joe Mattiello

Taco, flo-checks

Thank you, for using Taco, products. Yes you can install the external check valves on the return side. Some, might suggest redundancy, however it is considered good piping practice to have check valves on the supply and return in a primary/ secondary piping arrangement. This practice is to prevent the natural thermo siphoning tendency of hot water. Additionally, the arrows embossed on the side of the valves, are flow directional arrows. Always, point them in the direction of flow. Please advise, if you have additional questions, or concerns.





Joe Mattiello
Technical Service Technician

Joe Mattiello

Taco, flo-checks

Thank you, for using Taco, products. Yes you can install the external check valves on the return side. Some, might suggest redundancy, however it is considered good piping practice to have check valves on the supply and return in a primary/ secondary piping arrangement. This practice is to prevent the natural thermo siphoning tendency of hot water. Additionally, the arrows embossed on the side of the valves, are flow directional arrows. Always, point them in the direction of flow. Please advise, if you have additional questions, or concerns.





Joe Mattiello
Technical Service Technician

Paul_28

Flow checks

I understand that it is better to use the next size larger flow check then needed. Is that true???