pump flanges

Glenn Harrison_2

a 2" threaded isolation flange for pumps like the one's you listed.

http://www.watts.com/pdf/ES-IPF.pdf

craig_4

pump flanges

i have a taco 0011-f4 circ i need to install in a 2 inch iron pipe system. the flange needs to fit the smaller face on the circulator like the taco 007 or grundfos up15-42 residential pumps. ive exhausted my suppliers resources. id appreciate any input. i cant find anything larger than 1.5 inch that matches the pump. thanks in advance.

Brad White_51

Is there any harm in using 1.5 x 2 increasers?

Most pumps and circulators in commercial/institutional work do not have flanges that match their "travelling" line sizes. Why not install increasers on the largest (1.5") flanges you can find? Done all the time. Pressure drop is minimal, just allow some straight pipe upstream and downstream and isolate using full-port ball valves.

craig_4

flanges

I ONLY HAVE 15 INCHES BETWEEN A GATE VALVE AND A TEE. WOULD LIKE TO INSTALL ANOTHER ISO VALVE UPSTREAM OF PUMP. I HAVE 400 FEET OF 2 INCH ON THIS CIRCUIT. REDUCING WONT AFFECT PERFORMANCE?

Brad White_9

Reducing

will have an effect but it should be minor. I understand your space limitations.

Thinking like Hot Rod (I wish I could!) you might cobble something in the way of a flat plate flange welded to the end of a 2" nipple, sort of a flat bushing. Short space but a higher pressure drop than a proper increaser due to sudden expansion. Still, depending on how close you are to the pump curve/system curve, it may be your best bet.

Many circulators and full commercial pumps have reductions of 2, 3 or more nominal pipe sizes. The higher the pump head generally the smaller the discharge relative to the inlet.

Everything has a pressure drop and effect, cannot be avoided, just accounted for. You would be hard pressed to measure the difference between a 1.5 and 2 inch flange if you could find such a beast.

hr

How creative do you want to get?

Yes you can weld a 2" nipple to a steel flange. Barely, as the bolts get real tight to the pipe.

On "Radiant Ray" the hydronic man I used 2" pipe TIG welded to B&G steel flanges.

Or the copper 1-1/2" flange from Intermountain, now owned by Burnley of Canada. Can be made up pretty close.

Not to worry about a small close pipe reductiion at the circ. Take a look at the hole diameter in the volute itself!

hot rod

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Brad White_9

I knew you would know, Hot Rod

I agree with the tight volute diameter comment, but the pressure drop occurs with the sudden expansion. Still, not much in the scheme of things.

Amazing work as always.

Brad

Ron Schroeder

McMaster sells smooth flow reduction nipples but you might not have room for them.

Jerry_15

Good advice from all, but wouldn't the 0012 Taco fit right in there? They sell it for 2" flange I believe, 9" end to end. You can probably get a 2" Iso flange, or two (webstone?), and make your space. I agree reducing to 1 1/2 couldn't hurt. Good luck.

bob_50

Brad

wouldn't a sudden expansion cause a pressure increase? bob

Jerry_15

PS checked it out in the book Taco 0012-F4-1 CI, 2" flange, 9" end to end. Shipped with flanges included. I've used this pump many times it cures all. That leaves you with 6" to work with. I've done some of my best work with only 6". Good luck

Jerry_15

One can but hope.

Joe Mattiello_2

The 0011 companion flanges are available up to 1 ½ “ as you mentioned. However, you can use a reducing coupling increasing the diameter to 2” at the pump. This will not reduce the flow, or add resistance to the system. Incidentally Taco recently introduced a new shut off flange. For your reference I attached the catalog data.




Joe Mattiello
Technical Support Technician
Tel. 401-942-8000 X 484
Fax. 401-942-2360
1160 Cranston St
Cranston, RI 02920
joemat@taco-hvac.com

Brad White_51

I stand corrected (EDIT)

See below. Bob was right in that there is a pressure increase upon fluid expansion based on Bernoulli's Principle. I was thinking impact losses such as with compressible fluids which really does not apply here.. Duh! My bad. Happy to admit it.

Ron Schroeder

Hi Joe,

I would love to see an iso flange with a ball hole that tapers from the size of the pump outlet to the size of the pipe end.

bob_50

Brad

I thought Burn-ullys stuff would apply. Total pressure stays constant minus friction. If velocity pressure decreases then static has to increase. Isn't that how the pump turns velocity in the impeller to an increase in pressure at the outlet of the volute? bob

Brad White_51

Bernoulli Principle does apply, you are right Bob

What was I thinking? Thank you for calling me on that.

The dynamic/impact losses of a high velocity stream hitting a sudden expansion (The Wall so to speak) are what I was envisioning. Trading velocity against static pressure while total pressure remains constant, of course. What I had in mind was the sudden pressure loss associated with expansion such as in a TX valve in refrigeration, of course that is a change in state from high pressure liquid to low pressure gas. Of course Bernoulli's principle is more applicable to incompressible fluids such as water.

Back to school for me! Too long..

Thanks again.

Brad

Weezbo

Wow! *~/:)

That Radiant Ray guy looks to be Italian:)

long ago i had some steel flanges that were low profile ...real thin they could be spun onto the pipe till the pipe was equal to the face of the flange...

been awhile buh i belive B&G made them.