P/S Max GPM?

Blackoakbob

That's what I'm after, I will check out Taco, thanks. My plan is to tie three boilers to an existing system via the hydro separator. Your project sounds great. What did you use for boilers,if I may ask. Best regards, blackoakbob

Blackoakbob

P/S Max GPM?

Is there a maximum gpm limit on primary/secondary? I planning a job that may require 150 gpm total when all of the modcons are on. Also, would there be a significant PD across the IE. Caleffi unit? Thanks in advance. Best regards, blackoakbob

Brad White_185

No Limits

The principle of P/S piping is just that, a principle. It does not bow to size.

FWIW, I have recently completed a P/S system using two boilers handling 358 GPM each, feeding into a common HW system system with variable flow. Not a problem.

Oh, if you are looking for a larger flow rate low loss header, Taco has a line, 5900, which goes up to, well, name it pretty much, at least 12 inches, if memory serves.

Brad White_187

Hi Bob

The boilers were gas-fired Burnham V-1118's serving an elementary school formerly served by a 1956 Fitzgibbons fire-tube steam boiler.

I am now looking at retrofitting a series of five Aerco Benchmarks (2.0 MMBH input each, 90 GPM each) using a Taco hydronic separator. System was supposedly P/S but not really.... :P

The Taco unit in that size should be a neat fix, I think.

Paul Rohrs_7

12\" Taco Green Hydroseparator?

Sounds like a giant Hydronic sepository for proper flow.

Paul

Kal Row

the caleffi hydro seperator is avail in 6\" and 8\"

it's almost always the better way to do this - the bell and gossett people took one look at the Caleffi and they are selling it under their label - (they paint the non insulated ones red i suspect many others will follow, it just makes sense and when you think about the air and dirt separation effect combined with this huge point of zero pressure change, it also makes “dollars”, – not to mention the fact that to do close-T’s correctly, you need 6 primary pipe diameters on either side of the tees – a bit long with 4” pipe

Blackoakbob

Couldn't fird..

the Taco hydroseparator on the Taco website last night. I'll check again tonight. Are they calling it a "hydronic bridge"? I haven't been able to locate a local ( Minnesota) rep for Caleffi, most of the sales people say, "Who?"
Are they usually sized by the pipe size or gpm?
Best regards,
Happy Mother's Day!
blackoakbob

hot_rod

Caleffi has

supplied 10 and 12". I believe we have a 16" in the works for a special order. Your local rep or dealer should be able to get a price for you.

hot rod

Todd S_8

Taco 5900 Series

Hydrolic Seperator - here is the link:

http://www.taco-hvac.com/uploads/FileLibrary/400-2.8.pdf